Area Code Resources

Explore Area Code 505's technical details, covering Albuquerque & northwestern NM. Understand 10-digit dialing, NANPA regulatory oversight, & the 988 transition. Covers Bernalillo County, Santa Fe, Farmington, Gallup. Learn about 1+10D toll calls and 0+10D operator calls. Originally served all of NM; split in 2007.

Area code 925 covers California's East Bay, including Antioch. This guide details its history (split from 510 in 1998), dialing (1+10 digits), & regulatory oversight (CPUC). Learn about mandatory 10-digit dialing post-2021 and available fiber optic options like OpenFiber.

Area code 405 serves central Oklahoma, including Oklahoma City. Explore its geographic boundaries (35.46756, -97.51643), regulatory details under NANPA, and history since 1947. Understand the 572 overlay requiring 10-digit dialing and supported services like VoIP.

Area code 346 overlays Houston, TX, introduced July 1, 2014. Explore its geographic coverage including Alvin, Pasadena, & Sugar Land. What's the exhaust projection (late 2025)? Understand the telecom infrastructure: AT&T (35%), Verizon (30%), & VoIP services. Learn about NANPA & PUC regulations.

Area code 606 covers eastern Kentucky, including Ashland. This guide details its geography, telecom regulations (NANPA, Kentucky PSC), and dialing patterns. Learn about 7-digit vs. 10-digit dialing, number allocation managed to avoid exhaustion until 2043, and key cities within its diverse terrain.

Area Code 586 covers southeastern Michigan, primarily Macomb County. Discover its service area including Clinton Twp, Warren, and Sterling Heights. Understand 7D vs 10D dialing, MPSC regulation, and its 2001 split from 810. Find coverage details and dialing best practices.

Explore Texas area code 409, serving Beaumont, Galveston & more. Learn its technical details: single NPA type implemented March 19, 1983. Discover geographic coverage (e.g., Beaumont: 30.08605° N). Understand its NANPA regulatory framework & the 2021 ten-digit dialing transition.

Area code 351 is a Massachusetts overlay for area code 978, serving central/northeast regions. Covers cities like Beverly (42.55843, -70.88005) & Lowell. What's the implementation date? Why is 10-digit dialing required? Details on VoIP, landline, wireless services & NANPA regulation inside.

Area Code 607 guide: Explore its coverage across south-central NY, including Binghamton, Elmira & Ithaca. Understand 10-digit dialing (required since 10/24/2021), FCC regulations, and telecom services. Avoid scams & plan for 5G's impact; reserve numbers proactively.

Area code 661 serves Southern California, covering Kern & N. Los Angeles counties. Discover its history (established 1999 from 805), dialing (7-digit local), & regulatory details. Includes Bakersfield, Santa Clarita, Lancaster, Palmdale. Learn about CPUC oversight, numbering, & future overlay/split considerations.

Area code 239 serves southwestern Florida, covering Lee, Collier & parts of Hendry counties. Details its implementation in 2002 after splitting from 941. Explore dialing requirements (10-digit), NANPA regulations, supported landline, VoIP, wireless services, and major cities like Naples (26.14234, -81.79596).

Explore area code 219's telecommunications infrastructure in Northwest Indiana, covering Lake, Porter & La Porte counties. Includes major cities like Gary (41.59°N) & Hammond (41.58°N). Learn about NANPA regulations, the 2002 split creating codes 574/260, mandatory 10-digit dialing post-2021, & key carriers.

Explore NJ's Area Code 201: its role in the NANP since 1947, plus coverage details. Discover key cities like Jersey City & Hackensack. Understand the 7.92 million number pool, the 70% utilization rate, and the 551 overlay. Learn about major carriers and ten-digit dialing rules.

Explore Cincinnati's area code 513: its geography, standards, & history. Understand 10-digit dialing, the 2023 overlay of 283, & its original 1947 creation. Covers Hamilton, Butler, Warren & Clermont counties. Learn HNPA/FNPA dialing for seamless connectivity.

Area code 414 serves Milwaukee, WI, and surrounding regions within the NANP. Explore its geographic coverage including Waukesha County, dialing protocols post-October 2021, and major carriers. Understand the regulatory framework under NANPA, its 1947 origin, and subsequent splits (608, 920, 262) impacting number allocation.

Explore Area Code 307, Wyoming's only area code, established in 1947. Understand its geographic coverage, including Cheyenne (41.13998° N) and Casper (42.86663° N). Learn about NANPA regulations, 10-digit dialing, and why Wyoming maintains a single NPA code despite landline, wireless, & VoIP services.

Explore Area Code 706's coverage in northeast and west-central GA, part of the NANP. Understand its non-contiguous regions including Athens, Rome, and Columbus. Learn 10-digit dialing rules since the 762 overlay in 2006, ensuring proper call routing. Covers the Eastern Time Zone.

Explore Area Code 805's California coverage, including San Luis Obispo & Santa Barbara counties. Understand 10-digit dialing (due to the 820 overlay), NANPA oversight, & number pooling. Established in 1957, split from 213; 661 split in '99. Pacific Time Zone. Dial '1' + area code for long distance.

Area code 770 serves northern Georgia, covering Atlanta suburbs. This guide details its history since the 1995 split from 404, its 29-county coverage area, and dialing procedures. Learn about NANPA regulations, overlays like 678/470/943, and troubleshooting tips. Dial 10 digits for local calls.

Explore area code 478, serving Macon, GA, and central Georgia. Understand its geographic reach across Bibb, Houston & Baldwin counties. Learn 10-digit dialing for local calls. Discover key cities like Warner Robins (Robins AFB) and Milledgeville, a former state capital. Find FCC & GA PSC regulatory details.

Area code 531 serves eastern Nebraska, including Bellevue (41.13667° N, -95.89084° W) and Omaha. Understand 531's overlay on 402, introduced in March 2011 due to number exhaustion. Learn 10-digit dialing, HNPA/FNPA formats, NPSC telecom regulations, and troubleshooting call failures for optimal communication.

Explore Illinois' area code 618 (plus 730 overlay): geography, history & dialing. Covers Southern IL, including East Alton (38.88° N, -90.11° W). Established in 1947; now requires 10-digit dialing due to overlay implemented in July 2023. Serves 126 municipalities.

Area code 847 covers Algonquin, IL, and Chicago's northern suburbs; its overlay is 224. Understand 10-digit dialing, telecom providers, and ICC regulation. Includes dialing instructions for local, toll, and international calls. Learn about number pooling, introduced in 1998, and troubleshooting tips.

Area code 254 serves central Texas, including Waco (31.54933, -97.14667), Killeen, & Temple. Discover its single NPA type, implemented May 25, 1997, split from 817. Explore mandatory 10-digit dialing changes since 10/24/2021 due to the 988 lifeline, plus NANPA regulatory details.

Area code 681 serves West Virginia; this guide details its history and dialing patterns. Learn why 10-digit dialing is mandatory since the 2009 overlay of 304. Understand NANP compliance and number portability within the 681/304 area. Discover WV telecommunication infrastructure and troubleshooting tips for seamless WV connectivity.

Explore South Carolina's area code 864, covering Greenville, Spartanburg, and Anderson. Learn 10-digit dialing rules post-2024 overlay with area code 821. Understand NANPA/FCC regulation. Discover coverage details and avoid common dialing pitfalls. Serves 1.3M+ residents.

Area Code 540 covers western Virginia, including Blacksburg and Roanoke. Understand its geographic reach across counties like Montgomery and Roanoke. Learn 10-digit dialing requirements post-826 overlay in 2022. Includes NANPA regulatory details and dialing patterns for local (10D) and international calls. Center: 37.22957° N, -80.41394° W.

Area code 214 serves Dallas-Fort Worth, established in 1947 under NANP. Understand its overlay status sharing territory with codes like 945 since 2021. Explore 7.9M numbers, 75% utilization, key carriers (AT&T, Verizon, T-Mobile), PUC oversight, & its evolution from splits (817, 903, 972) to overlays.

Explore area code 678's Atlanta metro coverage, introduced in 1998 as an overlay to 404/770. Learn 10-digit dialing, key cities like Alpharetta, and regulatory details. Covers Fulton, Gwinnett, DeKalb & Cobb counties. Ideal for tech professionals needing telecom insights.

Area code 580 serves southwestern Oklahoma, including Altus, Lawton & Enid. Understand its geographic reach across multiple counties and dialing protocols (7-digit local, 1+10-digit toll). Learn about the 1997 split from 405 and NANPA regulation. Number portability details included.

Area code 620 covers southwestern Kansas, established in 2001 after splitting from 316. It includes Dodge City (37.7528° N, -100.01708° W), Garden City, & Hutchinson. Learn 10-digit dialing & NANPA's role. Why was it created & what are the key cities served?

Area code 775 serves Northern Nevada, excluding Las Vegas. Learn its history (split from 702 in '98), geography (Reno, Carson City), & dialing patterns (10D). Covers NANPA oversight & Nevada's 2,500-mile Middle Mile Network. Find FAQs and key facts.

Area code 336 serves north-central NC, including the Piedmont Triad (Greensboro, Winston-Salem). Covers dialing protocols, telecom services (VoIP, landline), & regulations. Established in 1997, 336 now requires 10-digit dialing due to overlay code 743 implemented 2015. Includes lat/long coordinates.

Explore area code 832, serving Alvin, TX & the Houston metro: dialing rules, geographic reach & regulatory framework. Understand 10-digit dialing (HNPA/FNPA). Covers carrier options (AT&T, Verizon, T-Mobile) & the Houston overlay (713, 281, 346). Essential for telecom professionals.

Area code 719 serves Colorado Springs & southern CO. This guide details its geography, dialing (local 10-digit, int'l 011+1+719+number), & regulatory history since its 1988 split from 303. Covers Pueblo, Canon City. No overlays exist currently. NANPA/FCC oversight.

Area code 860 covers north-central Connecticut, including Hartford & Bristol. Understand its geographic reach (e.g., Bristol: 41.67176 lat, -72.94927 long) & regulatory landscape. Learn about 10-digit dialing, carrier services (AT&T, Verizon), & number availability for compliant telephony app development.

Explore Area Code 870's Arkansas coverage, including dialing patterns and regulations. Understand mandatory 10-digit dialing post-327 overlay (effective 2/20/2024). Key cities: Jonesboro, Texarkana. Avoid errors; Hot Springs uses 501. Target counties like Craighead for precise location services. FCC/Arkansas PSC compliance is crucial.

Area code 574 serves northern Indiana, including Elkhart, South Bend, & Goshen. Understand its geographic reach (41.68199° N, -85.97667° W) & dialing patterns (10D local). Learn about NANPA oversight & number administration. Covers both HNPA & FNPA dialing.

Area code 682 serves Arlington/Fort Worth, requiring 10-digit dialing. This guide details its geographic reach, including Grand Prairie and Haltom City. Learn dialing patterns (10D local, 1+10D toll), NANPA regulatory oversight, and telecommunication services. Covers a region with >8 million residents.

Area code 442 serves Southern California, including La Quinta and Palm Springs. This guide details its coverage overlapping with 760 in Imperial/San Diego/Riverside counties. Learn 10-digit dialing procedures, its 2009 overlay origin addressing number shortages, and its role in the Coachella Valley's $8.7B economic impact.

Area Code 904 serves Jacksonville, FL, and surrounding areas. This guide details its geographic coverage (latitude 30.33218, longitude -81.65565) & telecom services. Understand 10-digit vs. 1+10-digit dialing, regulatory oversight by the Florida Public Service Commission, and cities included.

Area code 603 exclusively serves New Hampshire. This guide details its geographic coverage and dialing patterns, including 10-digit local calls. Learn FNPA/HNPA rules, NANPA oversight, and central office prefixes like 976 (Concord). Discover number conservation efforts addressing potential exhaustion.

Explore area code 774's function as an overlay for 508 in southeastern MA. Learn about mandatory 10-digit dialing, key cities like Worcester, and regulatory standards. Includes geographic coordinates (41.94454, -71.28561), county coverage (Bristol ~19%, Worcester ~24%), and HNPA/FNPA dialing formats for local/toll calls.

Area code 920 serves eastern Wisconsin, including Appleton, Green Bay & Oshkosh. Established in 1997 from 414, it now requires 10-digit dialing due to the 274 overlay. Covers latitude 44.26193, longitude -88.41538. Managed by FCC/NANPA; learn dialing & regulatory details.

Area code 954 serves Broward County, FL, including Fort Lauderdale & Coconut Creek. Learn its history stemming from area code 305's 1995 split due to rapid growth. Understand NANPA regulations requiring 10-digit dialing and the 754 overlay introduced in 2001. Discover telecom services in this bustling region.

Area code 930 serves Bloomington, Indiana, and Monroe County. This guide details its history, usage, and dialing patterns (10D local, 1+10D long-distance). Learn about the 2015 overlay from 812 due to NANP exhaustion. Discover IURC regulatory oversight and carrier options. Essential for telecom professionals.

Area code 936 covers southeastern Texas, including Conroe. This guide details dialing (7 vs 10-digit), NANPA oversight, & its 2000 split from 409. Learn local/toll call procedures. Understand number portability, troubleshooting call quality (signal strength), & major cities like Huntsville. Stay connected!

Explore Area Code 501, serving central Arkansas including Benton & Little Rock. Understand its geographic reach (latitude 34.56454), history since 1947, & dialing (10D). Covers Conway, Hot Springs, North Little Rock. Learn about NANP compliance & number pooling for efficient allocation.

Area Code 516 serves Nassau County, NY, including Baldwin. This guide details its geographic reach and telecom regulations. Dialing uses 10D locally and 1+10D for long distance. NANPA/FCC regulate it. Covers Hempstead, Freeport, Garden City. Learn about number management and key carriers.

Area code 970 serves northern/western Colorado, including Fort Collins. Learn 10-digit dialing (required since 2021) & geographic reach. Covers Grand Junction, Steamboat Springs, Greeley, plus Aspen, Vail & Durango. Explore the 970 regulatory landscape; overlay code 748 planned for 2025/2026 due to number exhaustion.

Area code 743 serves Asheboro & the Piedmont Triad, NC. Understand its coverage area including Greensboro & Winston-Salem. Learn mandatory 10-digit dialing due to the 336 overlay. Why was 743 introduced in 2015? Find geographic coordinates (35.70791° N, -79.81364° W) and regulatory details.

Explore area code 216, Cleveland's original 1947 NANP code. Learn its geography (41.49932, -81.69436 for Cleveland), history (splits in '96 & '97), & regulations. Sufficient number allocations expected until 2038. Discover 10-digit dialing & NANPA adherence.

Area code 785 covers north-central Kansas, including Topeka, Lawrence & Manhattan. This guide details dialing (local 785-XXX-XXXX, long distance 1-XXX-XXX-XXXX), regulatory bodies (NANPA/FCC), & number availability. 10-digit dialing became mandatory in 2021 due to 988 implementation. Covers Shawnee, Douglas & Riley counties.

Explore Oregon's area code 541, covering Albany, Eugene, Bend, and Medford. Understand 10-digit dialing (541-XXX-XXXX), toll calls (1-541-XXX-XXXX), & regulatory oversight. Learn its 1995 split from 503 due to increasing demand & the Oregon PUC's role in telecommunication services.

Explore California's Area Code 209: its geographic reach, cities (Stockton, Modesto, etc.), and the overlay Area Code 350. Understand mandatory 1+10-digit dialing post-November 2022. Learn about NANPA/FCC regulations and the 1957 origin. Discover network infrastructure details.

Explore NJ area code 973's technical details, covering Newark, Paterson & Belleville. Understand its dialing patterns (10D standard), latitude (40.79371), & regulatory oversight. Essential for developers needing location-based service & telecom compliance within the 973/862 overlay.

Area Code 947 serves West Bloomfield Township, MI, and parts of Oakland & Wayne counties. Understand its overlay on 248, requiring 10-digit dialing. Covers 42.56891° N, 83.38356° W. Introduced in 2002 due to number exhaustion, it serves a population of 1.27M+ in Oakland County. Learn FCC telecom regulations.

Area code 725 serves Henderson, Nevada and greater Las Vegas. This guide explains its geographic reach and dialing formats, including mandatory 10-digit dialing. Learn local, NANP, and international call formats. Understand FCC/NANPA regulatory oversight and troubleshooting tips for 725-XXX-XXXX numbers.

Explore area code 507, serving southeastern Minnesota. Understand its geographic reach including Rochester and Mankato, dialing (10D local), and the 924 overlay implemented August 2024. Learn about NANPA/FCC regulatory oversight and VoIP options. Discover its history since 1954.

Explore Area Code 415: San Francisco & Marin County's telecom infrastructure. Understand its overlay type, established in 1947. Covers Novato (38.10742, -122.5697) & San Rafael. Learn about 10-digit dialing, CPUC oversight, & NANPA compliance. Vital for VoIP, wireless & landline services.

Explore Iowa's area code 319, serving east-central/southeastern regions. Understand its coverage including Cedar Rapids, Iowa City & Waterloo. Established in 1947, learn about the transition to ten-digit dialing in 2021 and its original implementation under NANP. Discover key telecom insights.

Explore area code 713, Houston's original code. This guide details its coverage beyond Houston, including Alvin, Pasadena and Pearland. Learn 7/10-digit dialing, regulatory oversight by PUCT, and number availability. Store numbers in E.164 format (+1713) for compatibility.

Explore Pennsylvania's area code 717, serving Harrisburg, Lancaster & York. Learn its history from 1947, the 1998 split creating 570, and the 2017 overlay 223 implementation. Understand 10-digit dialing requirements and geographic boundaries within south-central PA. Covers regulatory oversight by the PUC.

Area code 714 covers Orange County, CA, including Anaheim and Santa Ana. Explore its history from area code 213, the 657 overlay requiring 1+10 digit dialing, and CPUC regulations. Learn about number acquisition challenges and VoIP.

Area Code 484 serves Allentown, PA & the Lehigh Valley. Explore its geographic reach including Bethlehem, Easton, Reading & West Chester. Understand the NANPA regulatory oversight, 10-digit dialing (even locally), and its overlay with area code 610. Vital for the region's $50.96B GDP.

Area code 762 is a NANP code overlaying 706 in northeastern GA, including Athens. It avoids number exhaustion without splitting, unlike pre-1992's 404 split. 10-digit dialing is mandatory within the 706/762 area. NANPA projects viability beyond 2049. Serves Richmond County (pop. >200k).

Area code 831 serves California's central coast: Monterey, Santa Cruz, and San Benito counties. Learn its history (split from 408 in 1998), dialing formats (1+831+7 digits), and regulatory oversight by the CPUC. Discover number pooling, local call specifics, and NANPA details.

Explore Area Code 707: NANP region in Northern California. Covers Sonoma, Napa, Humboldt, Solano, Mendocino & Lake counties. Established in 1959, regulated by CPUC. Dialing requires 1+10 digits. Includes Benicia, Vallejo, Santa Rosa, Eureka. Overlay 369 added in 2023. Learn about telecom services.

Area Code 931 serves Middle Tennessee, including Clarksville. Understand its 28-county geographic coverage, dialing patterns (7D vs 10D), & carrier landscape. Ideal for developers needing NANPA insights or businesses operating within 36.52977 latitude and -87.35945 longitude.

Area code 858 serves northern San Diego County, including Poway, La Jolla, and Del Mar. Understand the 858/619 overlay requiring 10-digit dialing. Covers lat: 32.96282, long: -117.03586 in PT. Learn about CPUC regulations and telecommunication providers. Established in 1999 after split from 619.

Explore Area Code 708, serving Chicago's western/southern suburbs. Understand its 1989 origins from 312, the 1996 split to 847/630, and the 464 overlay since 2022. Covers Cook & Will counties; includes dialing formats (1+10D). Latitude ~41.88, Longitude ~-87.88.

Explore Area Code 626 covering Alhambra, CA, detailing its geography within the San Gabriel Valley. Learn dialing instructions (7-digit local, 1+626 for long distance). Understand the NANP, established in 1997 splitting from 818, and key cities like Pasadena. Discover local attractions like the Huntington Library.

Explore area code 619's technical details, covering Southern San Diego County. Understand 1+10D dialing, the 619/858 overlay, and NANPA guidelines. Essential for developers integrating telecom systems; learn about geographic coverage, operator-assisted calls (0+10D), and CPUC regulations. Master call routing!

Area code 980 serves Charlotte, NC & Mecklenburg Co. Learn its history as an overlay for 704 due to number exhaustion. Understand mandatory 10-digit dialing (980-XXX-XXXX). Covers Huntersville, Matthews, Mint Hill, Pineville. NANPA oversight details included. Population: 1.12M+ (2022).

Explore area code 704, covering Charlotte, NC, and southwestern NC. Understand its geographic reach across Mecklenburg, Cabarrus, Gaston, and Union counties. Learn 10-digit dialing procedures due to the 980 overlay, implemented in 2000, and the role of the NCUC. Originally statewide in 1947, 704 split in 1954 and 1998.

Area Code 667 is an overlay for MD area codes 410/443, serving eastern Maryland. Covers Baltimore, Annapolis, & the Eastern Shore. Understand 10-digit dialing, NANPA, number portability. Learn about VoIP, landline, mobile options. Alleviated pressure on 443 in 2012 as the 359th NANP code.

Area code 231 serves Michigan's northwestern Lower Peninsula. Details coverage areas like Muskegon (43.23418° N), Norton Shores (-86.26395° W), and Shelby. Explore its 1999 split from 616, NANPA regulations, 10-digit dialing, and telecom infrastructure specifics.

Explore NJ's area code 848, an overlay for 732, crucial for developers. Understand its geographic reach around Carteret (40.57733/-74.2282) & NANP dialing: 10D local. Account for overlays; one-to-one area code mapping causes errors. Validate numbers against both 732/848.

Explore Oklahoma's area code 918, established in 1953, and its overlay 539. This covers dialing formats (mandatory 10-digit), NANPA/FCC regulation, and cities like Tulsa. Learn about the transition from 405 and telecom infrastructure challenges, like fiber expansion (e.g., Bluepeak's $15M Bartlesville investment).

Explore Alaska's sole area code, 907, covering Anchorage and the entire state. Understand its regulatory framework (NANPA, FCC), dialing procedures, and service providers. Learn about mandatory 10-digit dialing since 10/24/2021 and Alaska Time (AKST/AKDT). Ideal for developers integrating telephony systems.

Explore Ohio's area code 220: an overlay for 740, implemented 4/22/2015 to combat number exhaustion. Covers cities like Athens (39.32924, -82.10126) & Zanesville. Learn 10-digit dialing rules and PUCO regulation. Essential telecom infrastructure details inside.

Explore area code 609 in New Jersey, covering Atlantic City, Trenton & Princeton. Understand its NANP role, overlay code 640 (since 2018), & dialing: 10-digit local. Originally split from 201 in 1958, then 856 carved out in '99. Learn regulations & geographic scope.

Area code 802 exclusively covers Vermont. Understand its geographic reach using coordinates like 44.46699° N latitude. Learn 10-digit dialing for local calls, 1+802 for toll calls. Explore NANPA/FCC regulations and Vermont's telecom history since 1947, including providers like Waitsfield & Champlain Valley Telecom.

Explore Area Code 313's technical details, serving Detroit & Wayne County since 1947. Covers NANPA regulations, telecom carriers (AT&T 40%, Verizon 30%), & service types. Includes numbering statistics, like the 70% utilization rate and projected 2025 exhaust date. Learn about its geographic coverage.

Explore area code 310, a crucial NANP zone serving Los Angeles Westside/South Bay. Understand its 1991 split from 213, the 424 overlay, & dialing (1+310+7-digit). Covers Beverly Hills, Santa Monica, & regulated by CPUC. Learn about VoIP, landline, wireless services.

Explore Area Code 314: St. Louis' telecom hub since 1947. Covers St. Louis, Kirkwood, & University City. Understand the 557 overlay implemented August 12, 2022. Why is 10-digit dialing mandatory since 2021? Learn about NANP compliance and Missouri PSC regulations.

Area code 406 exclusively serves Montana, established in 1947. Explore its coverage including Billings (45.78° N), Bozeman (45.67° N), and major carriers like AT&T. Understand number pooling, the transition to 10-digit dialing in 2021, and projected number availability until 2031.

Explore Chicago's Area Code 312, covering the downtown & Loop. Learn its history from the original 1947 NANP assignment to the 2009 overlay with 872 requiring 10-digit dialing. Discover major carriers like AT&T & Verizon, the Illinois Commerce Commission oversight, and the ~7.92 million numbers managed.

Explore Area Code 803, serving central South Carolina, including Columbia and Aiken. Understand 10-digit dialing (mandatory since the 839 overlay in May 2020), geographic reach, and regulatory oversight by the SC Public Service Commission. Learn about local, toll, and operator-assisted call procedures within the NANP.

Area Code 760 serves southeastern CA, including Apple Valley, Victorville & Palm Springs. Learn dialing procedures (1+10-digit), CPUC regulations & number availability. Established in 1997 from 619, 760 now has the 442 overlay. Find telecom providers & avoid connection pitfalls in this guide.

Explore area code 252, serving northeastern North Carolina since 1998 after splitting from 919. Covers Greenville (35.61266, -77.36635), Kinston, & Rocky Mount. Understand NANP regulations, 10-digit dialing, VoIP, & major carrier services impacting this region's telecom infrastructure.

Area Code 979 serves Bryan/College Station, TX. Learn its history (split from 409 in 2000), geographic reach including Lake Jackson & Brenham, and dialing patterns. Discover regulatory oversight by NANPA/FCC. Understand 7-digit vs 10-digit dialing & telecom services offered in this region. One of <71 area codes allowing 7 digit dialing.

Area code 410 serves eastern Maryland, including Baltimore & the Eastern Shore. Explore its cities, carriers (Verizon, Comcast), & NANPA regulatory details. Introduced in 1991, 410 faces projected numbering exhaustion by 2030, using overlays 443/667. Ten-digit dialing is mandatory.

Explore Alabama's area code 205: its coverage area, major cities (Birmingham, Tuscaloosa), and telecom infrastructure. Understand the 659 overlay & 10-digit dialing. Includes city coordinates (e.g., Birmingham: 33.52066, -86.80249), carrier landscape, & regulatory details for developers.

Explore Area Code 303's north-central Colorado coverage, including Denver (39.73915° N) and Boulder (40.01499° N). Understand its 720/983 overlay, history since 1947, and regulatory compliance. Discover key telecom carriers and the mandatory ten-digit dialing requirements.

Area code 772 serves Florida's Treasure Coast. Understand its geographic scope (Fort Pierce South, Port St. Lucie, Vero Beach), telecom standards (7D local, 1+10D toll). Learn about NANP compliance, FCC/PSC regulation, and the 2001 split from 561 due to growth. Essential for seamless communication.

Area code 262 serves southeastern Wisconsin, including Milwaukee suburbs. Explore its geographic reach from Kenosha (42.58474, -87.82119) to West Bend (43.42528, -88.18343). Understand 10-digit dialing requirements implemented since October 2021 and its role in NANP. Learn about its 1999 split from 414.

Area code 213 serves downtown Los Angeles. This guide details its coverage area, overlay with 323 (since 2017), and dialing procedures. Learn about major carriers, VoIP, small cell tech for 5G, and CPUC oversight. Explore its history since 1947 and the planned 738 overlay for future number allocation.

Explore Area Code 951's coverage in Southern California, including Banning. This guide details its geographic boundaries (Riverside County), dialing (1+10-digit), & regulation. Learn about the 2004 split from 909, key cities, and the CPUC's oversight for consumer protection. Discover NANPA compliance.

Explore area code 757, covering Chesapeake, VA, and the Hampton Roads region. Understand its geographic scope across cities/counties like Accomack, Isle of Wight, and York. Learn 10-digit dialing procedures per NANP, the 1996 split from area code 804, and the region's economic impact with Naval Station Norfolk (120k+ personnel) and ODU.

Explore area code 941, serving Florida's Sun Coast: Manatee, Sarasota, & Charlotte counties. Understand mandatory 10-digit dialing implemented post-October 2021. Covers geographic coordinates (27.4631, -82.58176), telecom services (fiber, VoIP), & NANPA regulation. Ideal for tech-savvy users.

Explore area code 508's coverage in southeastern MA, including Worcester (2nd largest MA city), Framingham, & New Bedford. Understand 10-digit dialing (10D) & the 774 overlay. Learn about FCC & MA DTC regulations. Coordinates for Attleboro: 41.94454° N, -71.28561° W. When will 508/774 be exhausted?

Area code 854 serves North Charleston, SC, as an overlay to 843. Learn its geographic coverage including Charleston & Berkeley counties, introduced in 2015 by NANPA. Understand mandatory 10-digit dialing for local calls and key telecom players like AT&T. Avoid number exhaustion with this overlay solution.

Area code 808 exclusively serves Hawaii. This guide details its geographic reach across all islands, from Honolulu to Hilo. Learn 10-digit dialing for local calls, plus toll/international formats (1+808+...). Understand NANP regulatory compliance and number portability. Hilo's coordinates: 19.72991, -155.09073.

Explore area code 801's Utah coverage area, including the Wasatch Front and cities like Salt Lake City and Provo. Understand the 801/385 overlay, requiring 10-digit dialing. Learn about its history since 1947, geographic boundaries encompassing 5 counties, and telecommunication regulatory compliance. Get best practices for local/toll calls.

Area code 732 serves central NJ, including Carteret, New Brunswick & Toms River. Learn dialing protocols (10-digit), the 848 overlay, and its 1997 split from 908. Discover key telecom providers and the impact of Rutgers University. Explore the region where 96% of prefixes are assigned.

Explore area code 857, an overlay for 617, serving Belmont, MA & Greater Boston. This guide details dialing (10D local), regulatory context & technical specs. Learn about HNPA/FNPA dialing standards & the reasons for the overlay, addressing number exhaustion. Discover why Belmont, with a $164,918 median income, uses 857.

Explore Area Code 413's function within the NANP, covering western Massachusetts cities like Springfield and Pittsfield. What are its technical specs? Learn about its 7.92 million numbers, 45% utilization, key carriers (Verizon 35%, AT&T 30%), and projected 2030 exhaust date. Discover regulatory details.

Explore area code 386, serving northern Florida since 2001 after splitting from 904. Covers Daytona Beach, Palm Coast, and Volusia County. Understand its telecom services, regulatory oversight by the Florida Public Service Commission, and its role within the NANPA. Includes key implementation dates and historical splits.

Explore Area Code 315, serving north-central NY since 1947. Covers Syracuse, Utica, Watertown; spans from Wayne County to Little Falls. Includes overlay 680 since 2017. Learn about NANPA compliance and ten-digit dialing requirements due to numbering exhaustion. Discover major carriers and historical developments.

Explore area code 360, serving western Washington (excluding Seattle), since its split from 206 in 1995. Covers cities like Bellingham & Vancouver. Understand mandatory 10-digit dialing since the 564 overlay in 2017, managed by the Washington Utilities and Transportation Commission, adhering to NANPA for number assignments.

Explore Texas area code 361, serving Corpus Christi, Kingsville & Victoria. Learn its origins from a 512 split in 1999 and the 2021 transition to 10-digit dialing. Includes key cities' lat/long coordinates: 27.80058/-97.39638 (Corpus), plus NANPA regulatory details.

Area code 308 serves western Nebraska, established in 1954. Explore its geographic reach, covering cities like Grand Island (40.92501, -98.34201) and North Platte. Learn about NANPA regulations and 10-digit dialing; the area is projected to remain unchanged until 2050.

Area code 267 is an overlay serving Philadelphia & SE Pennsylvania. It answers: What areas use 267? How many numbers are available? Expect ~7.92 million numbers with 50% utilization. Primary carriers include Verizon (40% market share) and AT&T (30%). Exhaust projection is beyond 2050.

Explore area code 234, an overlay serving northeast Ohio since October 30, 2000. This guide details its coverage including Akron (41.08144, -81.51901), Canton, & Youngstown. Learn about mandatory 10-digit dialing implemented October 1, 2000, NANPA regulation, & supported VoIP services.

Area code 779 serves northern Illinois, including Belvidere, as an overlay to 815. Understand its geographic scope (latitude 42.26391) & telecom standards (1+10D dialing). Learn the history and purpose of this NANP area code, introduced in 2007, and its impact on regional connectivity.

Explore Area Code 716's comprehensive guide covering Buffalo, NY, and its surrounding Western New York region. Understand 10-digit dialing, including local calls. Learn about NANPA's role, the 624 overlay due to prefix exhaustion projected in 2024, and dialing procedures for Erie, Niagara, Cattaraugus, and Chautauqua counties.

Explore Missouri's area code 417: its 1951 origin, coverage of Springfield (37.21533° N, 93.29824° W), Joplin, and telecom infrastructure. Understand NANPA oversight, ten-digit dialing post-2021, and major carriers like AT&T (40% share) & Verizon (35%).

Explore area code 407, serving Orlando & Central Florida since 1988. Understand its telecom landscape, covering Orange, Osceola & Seminole counties. Includes major carriers like AT&T, Verizon, T-Mobile. Learn about 10-digit dialing & the 689 overlay.

Area code 316 serves Wichita, Kansas (37.69224° N, -97.33754° W). Explore its coverage area, technical infrastructure supporting landline, wireless, & VoIP, plus regulatory oversight by the Kansas Corporation Commission. Established in 1947, learn about dialing requirements (10-digit), historical splits (620, 785), and projected lifespan beyond 2050.

Area code 320 serves central Minnesota, excluding the Twin Cities. Explore its geographic reach (45°27′N 94°45′W), technical specs, & supported services like VoIP. Learn about its 1996 split from 612, 10-digit dialing rules, & NANPA regulation. Discover key cities like Saint Cloud (45.5608, -94.16249).

Area code 615 serves Middle TN, including Nashville & Brentwood. This guide details its geographic reach (12 counties), dialing (10D mandatory since 2015 due to 629 overlay), & services. Learn about NANPA, TRA regulatory oversight, & key cities like Murfreesboro & Franklin. Essential for seamless communication within the 615/629 area.

Explore Oregon's Area Code 458: an overlay with 541, excluding Portland/Salem. Essential for developers building telephony apps. Understand its geographic reach, cities like Albany, Eugene, Bend, Medford, Springfield, and FCC/OPUC regulations. Includes mandatory 10-digit dialing and thousands-block pooling details.

Area code 747 is an overlay for Agoura Hills, CA, sharing territory with 818. Learn its history, purpose (number exhaustion solution), & dialing patterns. Understand the NANP, CPUC oversight, troubleshooting call routing (10-digit dialing), & number portability. Established in 2009 due to increased demand.

Area code 334 covers southeastern Alabama, including Montgomery and Auburn. Explore its geography (lat/long coordinates provided), history since its 1995 split from 205, and regulatory details. Learn about mandatory 10-digit dialing and the upcoming 2026 exhaust projection necessitating overlay code 483.

Explore Area Code 318's coverage area in northern/central Louisiana. Identifies cities like Shreveport (32.52°N, 93.75°W) & its 1957 origin. Details upcoming 2025 overlay 457. Learn about NANPA regulations & telecom services. Exhaust projected early 2026.

Area code 276 serves southwestern Virginia. This guide details its coverage, from Bristol (36.5951, -82.1887) to Martinsville (36.6915, -79.8725). Understand the 2001 split from 540, mandatory 10-digit dialing since 2021, NANPA compliance, and major telecom carriers.

Explore area code 567, an overlay for 419 in northwestern Ohio, introduced 1/1/2002. Learn 10-digit dialing for local calls (567-XXX-XXXX), its NANP regulatory context, and coverage including Toledo, Mansfield, Findlay. Understand the overlay's purpose and troubleshooting tips for seamless connectivity.

Explore Atlanta's area code 404, a vital NANP code established in 1947. Discover its geographic coverage within I-285, overlay status, and utilization of 7.92 million numbers. Understand its regulatory oversight by the Georgia Public Service Commission and its historical context, including the 943 overlay implemented in 2022.

Area code 309 serves west-central Illinois, including Bloomington and Peoria. Learn about its 861 overlay, implemented to prevent number exhaustion. Details its 1957 origin, transition to ten-digit dialing in 2021, latitude/longitude coordinates of served cities, and regulatory oversight by the ICC.

Area code 929 is a New York City overlay (with 718/347) covering the Bronx and parts of Queens/Brooklyn. This guide details its history (implemented 4/16/2011), dialing (10-digit mandatory since 10/24/2021), and regulatory oversight (FCC/NANPA). Learn about number portability and troubleshooting connection issues.

Explore Area Code 502's coverage area in north-central Kentucky. Learn about 7-digit vs 1+10D dialing, plus cities like Louisville & Frankfort. Includes counties Anderson to Trimble. Discover regulatory standards (HNPA/FNPA LOCAL/TOLL) & NANPA projections for a new area code by 2027.

Area code 959 is an overlay serving central Connecticut, sharing territory with 860. It requires 10-digit dialing. Learn its cities like Hartford, Bristol, New Britain. Understand regulations, number allocation, and best practices for seamless communication. First numbers weren't distributed until Dec 2015.

Area code 402 is an original Nebraska code established in 1947, now overlaid with 531. It covers eastern Nebraska, including Omaha (41.25861°N) and Lincoln (40.8°N). Discover leading telecom carriers, mandatory 10-digit dialing rules since 2011, and key regulatory details.

Area Code 364 is an overlay serving Kentucky's western/south-central regions alongside 270. Implemented March 3, 2014, it mandates 10-digit dialing. Covers cities like Bowling Green (36.99032, -86.4436) and supports landline, wireless, & VoIP; regulated by NANPA standards.

Area code 385 is an overlay (NPA) serving Utah's Wasatch Front. It overlays area code 801, implemented June 1, 2008. Covers Salt Lake City, Provo (40.23° N), Ogden & West Valley. Includes mandatory 10-digit dialing. Find carriers & regulatory details.

Area code 515 serves north-central Iowa, including Des Moines; essential for regional communication. This guide details dialing (10-digit mandatory since 2021), NANP standards, and regulatory oversight by NANPA/FCC. Covers key cities, coordinates (41.5868° N, 93.6250° W), and history since 1947.

Explore Ohio's area codes 937 and 326, serving Dayton & southwestern OH. Learn about the 326 overlay (introduced March 2020) due to 937 number exhaustion. Understand mandatory 10-digit dialing (NPA-NXX-XXXX), PUCO regulations, number availability, & troubleshooting for seamless connectivity.

Area code 347 is an overlay serving NYC's Bronx, Brooklyn, Queens, Staten Island, and Marble Hill. Learn about its implementation in 1999, major carriers (Verizon, AT&T), and supported services (landline, wireless, VoIP). Understand 10-digit dialing, NANPA regulations, and the exhaust projection in late 2026.

Area code 331 is an overlay for 630, serving Chicago's western suburbs since 2007. Covers DuPage, Cook, Kane, & Will counties. Includes cities like Naperville (41.78N), Bolingbrook (41.69N). Ten-digit dialing is mandatory. Explore telecom insights and regulatory details from the ICC.

Explore area code 321, an overlay serving Florida's Space Coast, including Brevard & Seminole counties. Details its 1999 implementation, major cities (Orlando, Melbourne), and telecom specifications. Understand FCC/NANPA regulatory compliance and the shift to 10-digit dialing since 2021.

Explore area code 323's Los Angeles coverage, an overlay implemented June 13, 1998. Discover cities served, including Bell (33.97751, -118.18702) and West Hollywood. Understand 10-digit dialing, NANPA compliance, and the upcoming 738 overlay in 2024.

Area code 317 serves central Indiana, including Indianapolis, since 1947. It's overlaid by 463, mandating 10-digit dialing since 2016. Explore its history, telecom carriers (AT&T, Verizon), regulatory oversight by IURC, and evolution from its initial northern Indiana coverage. Understand its geographic reach and numbering plan details.

Area code 972 serves the Dallas-Fort Worth metroplex; it's an overlay with 214 & 469. Learn its coverage area, including Allen, Plano & Richardson. Understand 10-digit dialing requirements and NANPA's role. Why was 972 created in 1996? Find the answers and troubleshoot dialing issues.

Area code 339 is a Massachusetts overlay serving Boston suburbs alongside 781. Discover cities covered like Arlington, Lexington, & Waltham. Implemented May 2, 2001, it requires 10-digit dialing. Explore VoIP, landline, & wireless services regulated by NANPA. Learn its telecom role.

Area code 325 serves west-central Texas, including Abilene (32.44874° N) & San Angelo (31.46377° N). Learn its history since the 2003 split from 915 & telecom services. Discover governing bodies like FCC/NANPA & mandatory 10-digit dialing requirements. Ideal for telecom professionals.

Area code 305 identifies Miami, Miami-Dade, and parts of Monroe County (including the Florida Keys) within the NANP. It's an overlay with 786 & 645, requiring 10-digit dialing. Established in 1947, 305 serves cities from Aventura (25.95648, -80.13921) to Key West (24.55524, -81.78163). Learn its regulatory framework.

Explore area codes 518/838 in Upstate NY: a technical guide for developers. Understand the NANP, 10-digit dialing, and the 24-county service area. Covers regulatory oversight by NYPSC. Essential for location-based apps, routing, and service provisioning. Includes key cities like Albany and Troy.

Area code 301 serves Maryland, including the D.C. metro area. It was implemented in 1947. Explore its geographic reach from Aspen Hill (39.07955, -77.07303) to Cumberland (39.65287, -78.76252). Discover major carriers like Verizon (40%) and its regulatory framework under FCC/NANPA.

Area code 281 serves Houston, Texas, as an overlay to 713, introduced in 1996 to expand numbering capacity. It covers cities like Pasadena & Sugar Land. Learn about NANPA compliance, the PUC's role, numbering statistics (31 million available numbers), and the exhaust projection (late 2025).

Area Code 703 covers Northern Virginia, including Alexandria, Arlington & Fairfax. This guide details dialing (10-digit mandatory), the 571 overlay, & NANPA regulation. Learn about the 1947 origin, splits creating 804/540, & troubleshooting common issues like call quality. NAS passwords expire after 180 days.

Area Code 830 serves southwestern Texas, including the Hill Country. Established in '97 from 210, it covers cities like Del Rio & New Braunfels. Understand 10-digit dialing (XXX-XXX-XXXX), NANP compliance, and service providers. Includes 27 counties and borders area codes 210 and 726.

Area code 272 is an overlay in northeastern Pennsylvania, sharing territory with 570. It mandates 10-digit dialing per NANPA for landline, wireless, & VoIP. Covers Scranton (41.40916, -75.6649), Wilkes-Barre, & Williamsport. Learn about its implementation since March 2013 and regulatory compliance.

Area code 269 serves Michigan's southwest Lower Peninsula since 2002. Explore its telecom infrastructure, covering cities like Kalamazoo and Battle Creek. Understand the NANPA regulations requiring 10-digit dialing within its 42.25°N, 85.50°W coordinates. Learn about VoIP, landline, wireless services.

Area code 270 covers western/south-central Kentucky. Learn its telecom infrastructure, from landlines to VoIP, plus dialing rules. Established in 1999 from area code 502, overlaid by 364 in 2014. Major carriers: AT&T (35% share), Verizon (30%), T-Mobile (20%). 10-digit dialing required.

Area code 256 serves Northern Alabama, established in 1998. Explore its coverage including Huntsville, Decatur, Florence, technical details, and regulatory compliance. Learn about the NPA code, overlay implementation (Area code 938 in 2010), carriers (AT&T, Verizon, T-Mobile), and dialing requirements.

Explore Washington's area code 253, established April 27, 1997, after splitting from 206. Covers Tacoma, Auburn (47.30732, -122.22845), Federal Way and Lakewood. Understand the NANPA regulatory framework and 10-digit dialing requirements for calls in the southern Puget Sound region.

Area code 260 serves northeastern Indiana, including Fort Wayne (41.1306° N, 85.12886° W). Learn its history stemming from area code 219 split in 2002. Understand NANPA regulations, mandatory 10-digit dialing, and telecom infrastructure details for seamless connectivity.

Explore Alabama's Area Code 251, serving Mobile, Baldwin & Washington counties. Established June 18, 2001 from area code 334. Details on NANPA regulations, including mandatory ten-digit dialing implemented October 24, 2021, plus key telecom services and geographic specifics like Mobile's 30.69436 latitude.

Area code 248 serves Oakland & parts of Wayne County, Michigan. Explore its geographic reach, including West Bloomfield (42.56°N), Novi, & Rochester Hills. Details on telecom services (landline, wireless, VoIP), NANPA regulations since its 1997 creation, and the 947 overlay relief code.

Explore NJ's Area Code 862: an overlay with 973, requiring 10-digit dialing. Covers Newark, Paterson, Clifton, Belleville (40.79371, -74.15014). Understand FCC/NJBPU regulations. Learn about permissive 1+10D dialing and troubleshooting connection issues. Essential telecom info.

Area code 240 is an overlay serving western Maryland, including cities like Frederick and Rockville. Implemented June 1, 1997, it overlays area code 301. Discover major cities covered, technical specifications (NPA 240), and regulatory details from NANPA. Ten-digit dialing is mandatory.

Explore area code 229 in Georgia, established in 2000 from area code 912. Understand its geographic reach (Albany, Valdosta), telecom carriers (AT&T, Verizon). Learn about NANPA regulations, mandatory 10-digit dialing, and the projected exhaust date of 2029. Get technical details.

Area code 225 serves southern Louisiana, including Baton Rouge. Established in 1998, it requires 10-digit dialing. Covers parishes like Ascension & Livingston. Get latitude/longitude (30.45075, -91.15455) and NANPA regulatory details. Learn about VoIP, landline, & wireless services.

Area code 228 serves Mississippi's Gulf Coast: Hancock, Harrison, & Jackson counties. Discover its telecom infrastructure established in 1997 from area code 601 split. Explore dialing requirements (10D/1+10D), major carriers (AT&T, Verizon), & NANPA regulation for Biloxi, Gulfport, Pascagoula.

Explore area code 217 (Central Illinois): technical specifications, geographic coverage (Champaign, Springfield, etc.), and the 447 overlay implemented in 2021. Understand 10-digit dialing requirements and the NANP framework. Learn about major carriers (AT&T, Verizon, T-Mobile) and the Illinois Commerce Commission's role.

Area code 224 is an Illinois overlay for 847, implemented 1/5/2002. Covers Lake, Cook, Kane, McHenry counties; includes cities from Algonquin (42.16N) to Zion (42.44N). Details on 10-digit dialing, NANPA regulations, VoIP, & number pooling for efficient telecom services.

Area code 218 serves Northern Minnesota; this guide details its telecom infrastructure. Explore its geography, including Duluth (46.78°N), Moorhead (96.76°W). Key facts: single NPA, implemented in 1947. Forecasted exhaust by 2028 with 45% utilization. Learn about NANPA compliance and major carriers.

Explore area code 734, serving Ann Arbor, MI: its 1997 origin from 313, Washtenaw County coverage, and dialing (7- or 10-digit). Understand FCC/NANPA regulations and telecom infrastructure. Covers Ypsilanti, Plymouth, plus parts of Wayne/Monroe counties. Time zone: ET. Learn about 1,650,960 numbers.

Explore area code 215, Philadelphia's telecom hub since 1947. Understand its overlay (267/445), requiring 10-digit dialing. Covers Philly, Bucks, Montgomery counties. Learn about NANPA, PUC oversight, numbering capacity (~23 million), exhaust projections (beyond 2050), and key carriers like Verizon/AT&T.

Explore Connecticut's area code 203, serving Bridgeport, New Haven & Stamford. Learn its history from 1947, the 475 overlay details, & 10-digit dialing mandates. Covers geographic reach, key telecom carriers like AT&T/Verizon, & PURA regulations. Includes lat/long coordinates.

Explore Manhattan's iconic 212 area code: its history, technical details, and regulatory framework. Learn about its overlay status with 646/332 requiring 10-digit dialing. Discover its ~98% utilization rate, serving NYC's core at 40.71427, -74.00597. Understand carrier market share and VoIP impact.

Explore Idaho's area code 208, covering the entire state and overlayed with 986. Understand its 1947 origin, the 2017 ten-digit dialing mandate, and NANP integration. Learn about number pooling, exhaustion projections, and the IPUC's regulatory role. Discover the combined capacity of 15.6 million numbers.

Explore San Antonio's area code 210: its history, technical specs & regulatory framework. Established in 1992 from 512, now overlaid with 726, mandating 10-digit dialing. Includes key carriers like AT&T and Verizon. Learn about the PUCT oversight and NANP compliance.

Explore Maine's area code 207: its technical specifications, geographic reach, and regulatory framework. Learn about its 7.92 million number capacity, 62% utilization rate, and exhaust projection in Q1 2027. Understand 10-digit dialing requirements and carrier market share (Verizon 35%, AT&T 30%).

Explore Seattle's area code 206: its geographic coverage (including coordinates like 47.60621, -122.33207), technical specs, and the 564 overlay implemented in 2023. Understand its 7.8 million numbers, 75% utilization, and the mandatory 10-digit dialing requirements.

Area code 623 covers Avondale, AZ, and the Phoenix metro's west region. Learn the dialing formats, including mandatory 10-digit dialing implemented in 2023. Understand HNPA, NANP, and the 33.4356° N, 112.3496° W coordinates. Explore regulatory context and avoid connection issues.

Area code 806 serves Amarillo, TX, and the Texas Panhandle. This guide details its location (35.222, -101.8313), dialing patterns (10D, 1+10D), and regulatory context (NANPA/FCC). Learn about the 2021 transition to mandatory 10-digit dialing and its impact, plus key cities/counties covered.

Area code 419 is an Ohio NPA serving the northwestern region, overlaid by 567 since 2002. Explore its geographic coverage including Toledo (41.66° N), Ashland (40.86° N). Understand mandatory 10-digit dialing, NANPA regulations, VoIP, landline, wireless services, and its role in Ohio's telecom network since 1947.

Area code 412 serves Pittsburgh, PA, and nearby regions within the NANP. Explore its overlay type, established in 1947, covering Allegheny County and coordinates [40.44062, -79.99589]. Understand its regulatory framework, major carriers like Verizon and AT&T, and mandatory 10-digit dialing since 2001.

Explore area code 408's details, serving California's Bay Area since 1959. Includes San Jose & Santa Clara. Understand its 7.92M numbers, 70% utilization, AT&T/Verizon market share, plus CPUC/NANPA regulations. Mandatory 10-digit dialing since 2012; overlays with area code 669.

Area Code 401 exclusively serves Rhode Island; established in 1947 under NANP. Explore its geographic scope from Providence (41.82399, -71.41283) to Woonsocket (42.00288, -71.51478). Covers landline, wireless, VoIP; projected exhaust date 2055. 10-digit dialing required.

Area code 352 serves Florida's Gainesville region. Learn its geographic reach across Dixie, Levy, Marion counties, and more. Details on 10-digit dialing implemented 10/24/21. Forecast: new area code needed by late 2027. Includes major carriers & VoIP.

Area code 330 serves Northeast Ohio, including Akron & Canton. Established in 1996 from 216, it now overlays with 234. Covers landline, wireless, & VoIP. Mandatory 10-digit dialing since 2000. Includes major cities' coordinates.

Area code 740 covers southeastern Ohio, including Athens. Understand 740 dialing patterns, the 220 overlay requiring 10-digit dialing, and its 1997 split from 614. Explore key cities like Chillicothe (former state capital), Lancaster, Newark, and Zanesville. Learn about number availability.

Area code 952 covers Bloomington, MN, and its suburbs, using 10-digit dialing. It includes Eden Prairie, Edina, & Minnetonka. Governed by NANPA/FCC, it ensures telecom services. Bloomington's population (2022): ~89,244; median income: $87,381. Learn local/toll call procedures & regulatory details.

Area code 610 covers Allentown, PA, and southeastern Pennsylvania. It split from 215 in 1994; 484/835 are overlay codes. Understand 10-digit dialing, service providers, & NANPA. Serves 1M+ residents in Lehigh Valley; median age 39, $66,214 income.

Area code 956 serves South Texas' Rio Grande Valley. This guide details its coverage area, including Cameron, Hidalgo, Starr, Webb, & Willacy counties. Learn 7/10-digit dialing for local/toll calls and telecommunication providers. Vital for international trade and a growing economy.

Area code 509 covers Eastern Washington, including Kennewick. Understand 10-digit dialing, HNPA/FNPA, and the 2021 change requiring it due to the 988 Lifeline. Learn local vs toll call patterns (1+10D). Covers Spokane, Yakima, and the Tri-Cities economic impact. NANPA details included.

Area code 559 covers California's Central San Joaquin Valley, including Clovis and Fresno. Learn 7-digit vs 10-digit dialing, and the upcoming 2025 overlay code 357 implementation. Includes geographic coordinates (36.82523° N, -119.70292° W) and CPUC regulatory details. Understand local/toll call patterns.

Explore Pennsylvania's area code 570/272: its overlay, history since the 1998 split from 717, and geographic reach. Understand mandatory 10-digit dialing and NANPA regulation. Includes key cities, the Back Mountain region (pop. 33,551 in 2016), and telecom services.

Area code 630 covers northeastern Illinois, including Addison, Aurora & Naperville. This guide details its geographic reach, the 331 overlay requiring 10-digit dialing. Learn about NANP compliance, key telecom providers like AT&T/Verizon, and the expansive local calling area including 312/773/872, crucial for residents & businesses.

Explore area code 617's coverage in eastern MA, including Boston, Cambridge & surrounding areas. Understand NANPA dialing: local (10D), toll (1+10D). Discover the 857 overlay implemented in 2001, requiring 10-digit dialing. Belmont's coordinates are 42.39593° N, 71.17867° W.

Area Code 781 covers eastern Massachusetts, including Boston suburbs. Learn its history (split from 617 in 1997), the 339 overlay, and mandatory 10-digit dialing. Includes coverage map, regulatory details (NANPA), and troubleshooting for reliable connectivity. Time zone: EST/EDT.

Area code 828 covers Western NC, including Asheville. This guide details its geographic reach (19 counties), dialing (7-digit local), & regulatory oversight by NCUC. Learn about NANP origins in 1998, approximate Lat/Long coordinates (35.60095, -82.55402), & scam protection for 828.

Area code 917 is a NYC telecom identifier covering all five boroughs. Understand its NANP regulatory framework using 1+10D dialing for local/toll calls. Learn about its 1992 overlay origin, initially purposed for cell phones, plus troubleshooting tips and FCC/NANPA resources.

Explore Area Code 602, serving central Phoenix, AZ, within the NANP. Understand its geographic boundaries (33.44° N, -112.07° W), evolution from a statewide code in 1947, to the 2023 overlay with 480/623. Learn about mandatory 10-digit dialing and regulatory oversight by the ACC.

Area code 720 serves north-central Colorado, overlaying 303 and requiring 10-digit dialing. Explore 720's coverage map, including Denver, Aurora, Boulder, Arvada (39.80276, -105.08748), and dialing patterns. Understand NANPA/Colorado PUC regulations for telecom, VoIP, and carrier services in the 720/303 overlay.

Area code 424 serves southwestern Los Angeles County, overlaying 310; learn its cities & dialing. Why is 10-digit dialing mandatory? Discover its history since July 26, 2006. Covers Beverly Hills, Santa Monica, Malibu, centered around 34.07362° N, -118.40036° W. Explore NANP details.

Area code 616 serves western Michigan, including Grand Rapids. This guide details its geographic reach (Kent, Ottawa counties), dialing (10-digit mandatory since 2021). Learn about the NANP, telecom infrastructure, MPSC regulation, and history (splits in '61, '99, '02) for effective communication.

Explore area code 818's coverage in Southern California's San Fernando Valley. Understand the 747 overlay, mandatory 10-digit dialing, and CPUC regulations. Includes cities like Burbank and Glendale. Learn about its 1984 split from 213 and its service area of 260 square miles.

Explore area code 916, serving Sacramento, CA: its geography, regulation, & dialing. Understand the 279 overlay & mandatory 10-digit dialing. Includes AT&T, Verizon, T-Mobile. Established in 1947, 916 initially covered NE CA; CPUC regulates. Learn about future changes & troubleshooting.

Area Code 650 covers the San Francisco Peninsula, established in 1997 from Area Code 415. Includes Palo Alto, Mountain View, and Redwood City. Learn 10-digit dialing (1+650+7-digit number) mandated in 2021 by the FCC, CPUC oversight, and its role in Silicon Valley's telecom infrastructure.

Area code 629 is an overlay for 615 serving Brentwood, TN & Nashville. This guide details its geographic coverage across multiple counties. Learn 10-digit dialing procedures for HNPA/FNPA calls, its 2014 implementation, and impact on Middle Tennessee's connectivity. Covers permissible dialing options too.

Area code 641 serves central Iowa, established in 2000 after splitting from 515. Covers Marshalltown, Newton, Pella & Grinnell. NANPA regulates; dial 7 digits locally. 641 lacks overlays, permitting 7-digit dialing. In the Central Time Zone (UTC-6). Number portability is available within Iowa.

Explore area code 815's northern Illinois coverage, including Belvidere, Rockford & Joliet. Understand the 779 overlay & mandatory 10-digit dialing. Includes key details on its 1947 origin, FCC/ICC regulatory oversight, approximate center coordinates (42.26391, -88.84427), & available telecom services.

Explore Indiana's Area Code 812, covering Bloomington, Evansville & Terre Haute. Understand its geographic reach & the NANP dialing format (10D local). Learn about the 930 overlay & regulations. Discover how to obtain a 812 number & navigate potential challenges.

Explore Pennsylvania's 878 area code: an overlay for 412/724, mandating 10-digit dialing. Understand its geographic reach in southwestern PA and the Pittsburgh metro. Learn about PUC regulation and telecom services. Activated 8/17/2001; find coverage maps on the PUC website.

Explore Florida's Area Code 727, covering Pinellas & western Pasco counties. Understand its 7-digit local dialing, the 1+10-digit toll call format, & NANPA regulation. Learn why Oldsmar uses 813 despite its location and the 1998 split from area code 813 due to population growth.

Explore Massachusetts area codes 978 & 351: an overlay serving northeastern MA. Understand mandatory 10-digit dialing. Created in '97/'01, covering Lowell, Lawrence, Haverhill. Includes history, NANPA/DTC regulatory details, & supported telecom services like VoIP (830 CMR 64H.1.6). Learn geographic coverage.

Area code 810 serves east-central Michigan. This guide details its cities (Flint, Port Huron), counties (Genesee, Lapeer), and dialing (10-digit local since Oct 2021). Learn the history (split from 313 in '93), FCC/NANPA regulations, and developer considerations for number availability and adjacent area codes.

Explore area code 575 in New Mexico, serving Alamogordo, Las Cruces, and Roswell. Understand its 2007 split from 505 and dialing protocols. Covers 32.89953° N latitude. Last US split.

Area Code 865 serves Knoxville, TN, and 9 counties in East TN. Understand NANP dialing: 10D local, 1+10D long distance. Post-10/24/2021, 10-digit dialing is mandatory, even locally. Covers Knoxville, Oak Ridge, Sevierville, and more. Explore carrier options and regulations.

Area Code 971 serves northwestern Oregon, including Portland. Understand its history as an overlay to 503 activated in 2000, requiring 10-digit dialing. Covers Salem, Gresham, Hillsboro, and Beaverton. FCC regulates its use; use 1+Area Code for toll calls. Essential for developers needing accurate location data.

Explore area code 425, serving Washington's Eastside, including Bellevue & Redmond. Learn its history from the 1997 split from 206. Understand HNPA/FNPA dialing procedures. NANPA oversees 425; an overlay with 564 requires 10-digit dialing. Find regulatory & troubleshooting info.

Explore area code 856, serving southwestern NJ including Camden, Vineland & Millville. Understand its history since the 1999 split from 609, and mandatory 10-digit dialing. Learn about landline, mobile, VoIP & broadband options, plus international dialing (011 + country code). Ideal for technical users.

Explore Area Code 512's Austin, TX coverage, including Round Rock & San Marcos. Understand its history from 1947, divisions to 210/361, & the 737 overlay. Learn 10-digit dialing rules, NANP compliance, & major telecom providers. Essential for technical understanding of Austin's telecommunications.

Area Code 530 covers Northern California; this guide details its geography and telecom services. Includes Butte, Shasta, Placer counties, plus Chico, Redding, Yuba City. Standard dialing is 1+10 digits. Overlay 837 coming 1/31/2025 requiring 10-digit local dialing. 86.9% of prefixes assigned.

Explore Ohio's area code 440, now overlaid with 436, covering areas outside Cleveland. This guide details mandatory 10-digit dialing, crucial after the 2024 overlay. Learn geographic coverage including Lake, Geauga & Ashtabula counties. Understand FCC & PUCO regulatory oversight; avoid dialing errors.

Area code 434 serves south-central Virginia, including Charlottesville & Lynchburg. This guide details its geographic reach, dialing (7-digit local), & regulatory info. Understand NANPA oversight, telecom providers like Verizon fiber, & number acquisition best practices for seamless system integration.

Explore area code 480, covering Phoenix's eastern suburbs in Arizona. Understand 10-digit dialing, including mandatory local calls, and the ACC/FCC regulatory landscape. Includes cities like Scottsdale, Mesa, Tempe, Chandler, Gilbert, and Apache Junction. Learn its 1999 origin due to area code 602 exhaustion.

Area code 804 serves east-central Virginia, including Richmond. This guide details its coverage area, dialing (mandatory 10-digit since 2021), & telecommunications. Includes cities, history (split from 703 in '73), the 686 overlay, & regulatory bodies like the Virginia SCC.

Area code 631 serves Suffolk County, NY, on Long Island's east end. This guide details its coverage area (40.73621°N, -73.26262°W for North Bay Shore), dialing (10D local), history (split from 516 in 1999), and regulatory oversight by NYPSC. Understand 631's telecom landscape.

Area code 765 serves central Indiana. Learn its history stemming from area code 317's 1997 split, covering 20 full & 12 partial counties. Understand 7D local dialing, IURC oversight, plus key cities like Lafayette (Purdue: 102k+ students) & Kokomo's tech history.

Explore area code 504's coverage area, encompassing Orleans, Jefferson, St. Bernard & Plaquemines Parishes in Louisiana. Understand 10-digit dialing, including 1+10D. Learn about VoIP, hosted PBX, & FCC regulations impacting 504, plus its historical shifts post area code 985 & Hurricane Katrina.

Explore South Dakota's area code 605, covering the entire state. Understand NANPA regulations, dialing (10-digit local, 1+10-digit toll), & telecom providers. Established in 1947, 605 serves major cities like Sioux Falls & Rapid City. Learn about its history, time zones (CT/MT), and unique telecom landscape.

Explore West Virginia's area codes 304 & 681, an overlay implemented in 2009. Understand 10-digit dialing (1+304/681+xxx-xxxx) for all local calls. Covers NANP compliance, major telecom providers, and the transition from a single area code due to increased demand.

Area code 669 serves Campbell, CA, and Silicon Valley cities. Understand its overlay on 408, requiring 10-digit dialing. Covers San Jose, Cupertino, Santa Clara. Learn about the CPUC's regulatory role and dialing formats, including 1+Area Code+7-digit number for all calls.

Area code 915 serves El Paso, TX & surrounding areas. Learn its coverage including El Paso, Hudspeth & Culberson counties. Understand 10-digit dialing requirements implemented in Oct 2021. Explore its history since 1947, dialing formats for local/international calls, & troubleshooting tips. Ideal for tech professionals.

Area Code 908 serves north-central NJ, covering Union, Somerset, and Hunterdon counties. Explore its geographic reach, communities like Cranford, and dialing formats (10D, 1+10D). Learn about NANPA regulatory oversight, its 1990 split from 201, and prefix assignment at 85% as of Dec 2024.

Explore Tennessee's area code 423, covering the Tri-Cities (Bristol, Johnson City, Kingsport) & Chattanooga. Understand the non-contiguous regions & dialing changes. Key update: mandatory 10-digit dialing starts February 2025 due to the 729 overlay. Learn about the TPUC's role & NANP.

Area code 520 covers southeastern Arizona, including Tucson and Casa Grande. Learn its history (split from 602 in 1995), dialing (10-digit), and regulatory oversight by the ACC. Includes key cities, dialing rules, and FAQs. Casa Grande had a population of 55.2k in 2022.

Area code 763 serves Minneapolis' NW suburbs; this guide details its coverage area. Learn 763's cities (Brooklyn Park, Plymouth), dialing (7-digit local), history (split from 612 in 2000), and NANPA oversight. Avoid dialing errors and understand numbering resources.

Area code 646 exclusively serves Manhattan, NYC. This guide covers its history as an overlay for 212, regulatory context (FCC/NANP), & technical implications. Learn about the Marble Hill exception (718), dialing procedures, number exhaustion, and best practices for data validation.

Explore Louisiana's area code 985, created in 2001 from area code 504. Covers Houma, Hammond, Slidell & Thibodaux. Dialing: 7-digit local, 1+10D toll. Includes regulatory details from LPSC/FCC. Population served: 1.6M+.

Explore area code 612: Minneapolis' core. Understand its focused geographic coverage, now serving primarily Minneapolis and select suburbs. Learn 7-digit vs. 10-digit dialing patterns. Established in 1947, 612 underwent splits (320, 651, 763, 952) but retains its urban core. Discover its economic impact and VoIP service options.

Explore area code 628, an overlay for Novato, CA, and the northern San Francisco Bay Area. Understand its 415 overlay requiring 1+10-digit dialing. Learn about CPUC regulations and NANPA's role. Discover why 628 was implemented in 2015 due to 415 number exhaustion. Covers San Rafael, Mill Valley too.

Area codes 845/329 serve New York's Mid-Hudson Valley; this guide details their coverage and history. Understand the 329 overlay, introduced March 2023, mandating 10-digit dialing. Includes key counties, like Ulster, and major providers, with Verizon leading landline prefixes at 20%.

Area code 813 serves Tampa and Hillsborough County, Florida. Learn its geographic reach including Brandon and Riverview, plus regulatory details from the PSC. Understand 10-digit dialing due to the 656 overlay, impacting local calls. Discover its evolution since 1953 and supported telecom services.

Area code 562 serves southeastern Los Angeles & northern Orange County, CA. This guide details its geography (33.88° N, -118.12° W), history (split from 310), & regulations. Learn about 10-digit dialing, PST/PDT time zone, CPUC oversight, & the 1+10D dialing format. Discover key cities like Long Beach & Downey.

Area code 443 covers Annapolis, MD, as an overlay to 410/667, requiring 10-digit dialing. Explore its geography across Baltimore City, Anne Arundel, and Howard counties. Understand regulations by the MD PSC vs. FCC. Learn about its introduction in 1997 and supported industries.

Area code 571 serves Northern Virginia, overlaying 703 and requiring 10-digit dialing. Covers Alexandria, Arlington, Fairfax, and parts of Fauquier & Loudoun counties. Implemented March 1, 2000, under FCC jurisdiction; supports landline, mobile, VoIP, and broadband. Understand dialing patterns and telecom services in the 703/571 region.

Area code 814 covers central/NW Pennsylvania, including Altoona. Understand its geographic reach, mandatory 10-digit dialing since the 2021 '582' overlay implementation. Learn about PUC/FCC regulatory oversight, troubleshooting tips, and best practices for seamless communication within the 814/582 regions.

Area code 903 serves Northeast Texas; established in 1990 from area code 214. Explore its geography including Tyler, Longview & Texarkana. Understand the 430 overlay requiring 10-digit dialing. Learn about NANPA & PUCT regulations for telecom services. Discover dialing formats: 10D local, 1+10D toll.

Area Code 769 is an overlay for 601 in central MS, covering 39 counties including Hinds & Rankin. Understand 10-digit dialing, its 2005 introduction due to phone number exhaustion, and its impact. Explore its geographic reach (e.g., Clinton: 32.34153° N, -90.32176° W) and telecom regulations. Ideal for tech professionals.

Area code 817 serves Arlington, TX, and surrounding Dallas-Fort Worth areas. This guide details its geographic coverage, including Fort Worth & Euless. Understand 10-digit dialing, NANPA regulations, and the history since its 1953 split from 915. Coordinates: 32.73569, -97.10807.

Area code 843 covers southeastern South Carolina's Lowcountry. Learn its history (split from 803 in 1998), dialing (10-digit since 2015), & the 854 overlay. Includes NANPA/FCC regulation insights & key cities like Charleston.

Area Code 901 covers Memphis, TN, and surrounding areas. Learn 7-digit local dialing, 1+10D toll calls, and regulatory oversight by the TPUC. Includes Shelby, Tipton & Fayette counties. Projected stability until 2035. Established in 1947; originally statewide.

Area code 517 serves south-central Michigan, including Lansing, Adrian, and Jackson. This guide details dialing (7-digit local, 1+10-digit toll), history since 1947, and the 2001 split creating area code 989. Learn about telecom services, regulations, and the NANP.

Explore area code 712, serving western Iowa, including Council Bluffs (41.26194° N, -95.86083° W), Sioux City, & Spencer. Learn 7-digit local vs. 1+10-digit long-distance dialing. Understand NANPA/FCC regulation. Covers local (7D), HNPA Toll (1+10D), FNPA (10D) dialing procedures.

Area code 754 is a NANP overlay for Broward County, Florida. Learn its cities (Fort Lauderdale, Hollywood), dialing (10 digits local), & regulatory oversight (PSC). Covers the 954 region. Crucial for developers handling phone number formats and validation. Implemented 8/1/2001 due to number exhaustion.

Explore Michigan's Area Code 989, covering Bay City, Midland, Saginaw, and Mount Pleasant. Understand 10-digit dialing (implemented October 2021), NANPA regulation, and its 2001 split from 517. Learn about number porting, troubleshooting call issues, and the MPSC's role. 989 is the highest area code possible.

Area code 660 serves northwestern/central Missouri. Learn dialing formats (10-digit local, 1+10-digit toll), key cities like Sedalia, Kirksville, Marshall, Warrensburg, Chillicothe. Discover NANPA/FCC regulatory oversight and the 1997 split from 816 due to phone number demand. Projected exhaustion: Q3 2043.

Area Code 539 serves Bartlesville, OK, and surrounding areas. Understand its geographic coverage in Washington County and dialing patterns (10-digit local, 1+10 toll). Explore telecom services, number availability, and regulatory oversight by the Oklahoma Corporation Commission. Essential for new residents/businesses.

Area code 601 covers central/southern Mississippi. This guide details its geography (32.34153, -90.32176 approx. center), regulations, & services. Learn 10-digit dialing patterns and key cities like Jackson and Hattiesburg. Understand the 769 overlay and service providers.

Area code 859 serves central/northern Kentucky, including Lexington & Covington. Understand its geographic boundaries across 20 counties like Fayette & Kenton. Learn 10-digit dialing (10D) for local/long distance calls. Discover the 1999 split from 606 & NANPA projections to 2047.

Area code 662 covers northern Mississippi, including Clarksdale, Tupelo & Greenville. Understand 10-digit dialing (mandatory since 10/24/21) & NANPA's role. Explore local (10D), toll (1+10D), & int'l dialing. Learn about Clarksdale, the "Birthplace of the Blues" and its cultural impact.

Area code 701 exclusively serves North Dakota, including Bismarck. Understand 7-digit local dialing, 10-digit toll calls, NDPSC regulations, & number availability. Includes geographic coordinates ~46.80833° N, -100.78374° W. Ideal for developers integrating telecom APIs.

Explore Missouri's area code 816, now overlaid with 975. This guide details its history since 1947, cities covered like Kansas City, and mandatory 10-digit dialing implemented October 2023. Learn about MPSC regulation, troubleshooting, and NANPA compliance. Includes Belton's coordinates: 38.81195°, -94.5319°.

Area Code 731 serves western TN, including Jackson. This guide details dialing (10-digit local, 1+10-digit long distance), history since its 2001 split from 901, and NANP oversight. Learn about Jackson's 68,000 population and TN's $813M BEAD broadband initiative.

Explore Area Code 651, covering Apple Valley, MN, and Dakota County suburbs. Understand 7/10-digit dialing, NANPA regulations, and avoid misdials. Includes key locations, like Burnsville, Eagan, Hastings. Discover permissive dialing nuances and overlay area code 952. Essential for telecom professionals.

Explore Florida's Area Code 561 covering Palm Beach County, including Boca Raton & West Palm Beach. Understand 10-digit dialing, the 728 overlay implemented in March 2023, & NANP regulatory compliance. Learn about the 1996 split from 407 and major telecom carriers.

Area code 585 covers Rochester, NY & surrounding areas. Learn dialing procedures: 7-digit local, 1+585+number for US calls. Established Nov 15, 2001 after split from 716. Includes Brighton (43.14756, -77.55055), Greece, Batavia. Managed by NANPA. Is 585 toll-free? Find out here.

Explore area code 718's technical details, covering the Bronx, Brooklyn, Queens & Staten Island. Understand its history, overlays (347, 929), & the NANP framework. Learn 10-digit dialing & FCC regulations for optimal telecom use in NYC; crucial for businesses & residents.

Area code 737 serves Austin, TX, and surrounding areas as an overlay to 512. Learn its geographic reach, including Round Rock & Pflugerville. Understand mandatory 10-digit dialing, even for local calls, due to the overlay. Activated in 2013, it supports Austin's growing tech sector (~9,800 employers).

Area Code 702 serves Henderson, Nevada, and greater Clark County. Understand dialing patterns (10-digit local, 1+10-digit long distance), telecom services (VoIP, landline), NANPA/FCC regulation. Covers Henderson's 36.0397° N, 114.98194° W coordinates. Projections indicate number sufficiency until 2055.

Area code 724 serves western PA, including Monroeville. This guide details its geographic reach, overlay with 878 requiring 10-digit dialing, and dialing patterns. Includes permissive dialing details, carrier info (AT&T, Verizon), and history since its 1998 split from 412.

Area code 715 serves northwestern Wisconsin, including Eau Claire. Understand its geographic reach, dialing (10-digit mandatory), and the 534 overlay. Learn NANPA regulations and best practices for developers integrating telephony; crucial for call routing and number validation. Covers cities like Wausau and Superior.

Explore area code 914's function in Harrison, NY, covering Westchester County's telecommunications. Understand 10-digit dialing (HNPA LOCAL: 10D) mandated since October 2021. Learn about regulatory oversight from the FCC and NY State Public Service Commission. Originally established in 1947, discover its historical significance.

Area code 913 serves Kansas City, KS, and its suburbs. Learn its history since 1947, dialing patterns (7-digit local, 1+10-digit long distance), and geographic reach. Covers Overland Park, Olathe, Shawnee, and Leavenworth. Understand KCC regulatory oversight and NANP role. Covers 8,472 square miles.

Explore area code 863, serving Lakeland, FL, and central Florida. Understand 7-digit local dialing, 1+10-digit toll calls, and the geographic center at 28.03947/-81.9498. Learn about HNPA/FNPA routing and regulatory oversight by FPSC/FCC. Ideal for technical users needing telecom insights.

Explore Utah's area code 435, covering Cedar City, Logan, St. George & more. Understand its expansive geographic reach beyond the Wasatch Front since 1997. Includes key city coordinates like Cedar City (37.67748, -113.06189) and dialing formats (7D local, 1+10D toll) per NANPA. Discover telecom options.

Area code 573 serves southeastern Missouri; this guide details its history, coverage, and dialing. Understand the 235 overlay requiring 10-digit dialing since March 2024. Key areas include Cape Girardeau, Columbia, and Jefferson City. Learn NANP/FCC regulatory oversight and troubleshooting tips.

Area code 928 covers Northern, Eastern, & Western Arizona. This guide details 10-digit dialing (mandatory since Oct 2021), local/long-distance calls, & regulatory oversight by the ACC. Learn about calling Flagstaff, Prescott, Yuma & avoiding common pitfalls like incorrect area codes or international access codes.

Explore Missouri's area code 636, covering St. Charles, Franklin, & Jefferson counties. Learn 7-digit local and 10-digit toll call dialing (1-636-XXX-XXXX). Discover key cities like Ballwin and O'Fallon. Understand its 1999 split from 314 and regulatory oversight by FCC/PSC.

Explore area code 940 in north-central Texas, covering Denton & Wichita Falls. Understand mandatory 10-digit dialing (since 10/24/2021) & NANPA's role. Includes lat/long (33.21484, -97.13307) for developers building telephony or location-aware apps.

Area code 469 serves North Texas, including Allen. It's an overlay for 214/972, requiring 10-digit dialing. Covers Dallas, Plano, Fort Worth, introduced July 1, 1999. Learn about NANP compliance, dialing formats (1+10D for toll), troubleshooting VoIP, and avoiding scams in the 469 NPA. Latitude 33.10317, Longitude -96.67055.

Explore Area Code 919's coverage area in central North Carolina, including the Research Triangle. Understand mandatory 10-digit dialing since 2012 due to the 984 overlay. Covers Raleigh (35.73° N), Durham, Cary, Chapel Hill, and Apex. Key telecom providers ensure connectivity in this innovation hub.

Explore area code 551, an overlay for 201 in northeastern NJ, including Bayonne. Understand the 10-digit dialing requirement for local calls. Covers Jersey City & Hoboken. Learn about number porting and telecommunication options. Bridge clearance: 150 feet.

Area Code 563 serves eastern Iowa, including Bettendorf, Davenport & Dubuque. Learn local/long distance dialing (7-digit vs 1+10-digit), NANPA/FCC regulation. Established in 2001 from 319, 563's approx. center is Latitude 41.52448, Longitude -90.51569. No overlay plans currently announced.

Explore area codes 910 and 472, serving southeastern NC. This guide details the NANP codes' history since the 1993 split from 919, geographic scope including Fayetteville (35.05N, -78.87W), and mandatory 10-digit dialing implemented with the 472 overlay in 2022. Learn about NCUC/FCC regulation.

Explore Chicago's area code 773, established October 12, 1996. This guide details its geographic coverage (excluding the downtown Loop), dialing procedures (1 + 10 digits), and regulatory oversight by NANPA. Learn about the 872 overlay and mandatory 11-digit dialing implemented November 7, 2009.

Area code 608 serves southwestern Wisconsin, including Beloit. This guide details its history since 1955, geographic reach (42.50835° N, -89.03178° W), and dialing: 10D local, 1+10D toll. Learn about the 353 overlay, NANPA regulation, and troubleshooting for seamless communication.

Explore area code 786's coverage, primarily Miami-Dade County, FL, plus parts of Monroe. Understand 10-digit dialing (10D) for local calls and 1+10D for toll. NANPA regulatory details included. Essential for developers integrating telephony; avoid 7-digit dialing due to the 786/305 overlay.

Area code 614 is Columbus, Ohio's telecom hub, vital for its diverse economy. Learn 10-digit dialing rules for local/toll calls, including FNPA & HNPA standards. Covers Columbus, Hilliard, Gahanna. Discover the 380 overlay implemented in 2016 and its impact. Essential for residents/businesses.

Area code 657 serves Southern California's Orange County. Understand its geographic reach, including Anaheim, Santa Ana, Fullerton, and dialing patterns. Learn about the 10-digit dialing requirement post-988 implementation and CPUC/FCC regulatory oversight. Discover its 2008 overlay origin due to 714 exhaustion.

Area code 984 is a North Carolina overlay for 919, serving the Research Triangle (RTP) including Apex. It requires 10-digit dialing. Introduced in 2011 by NANPA, 984 serves Raleigh, Durham, Chapel Hill, and Cary (35.73265° N, -78.85029° W). NCUC regulates this region's telecommunications.

Explore Georgia's Area Code 912, serving the southeastern region. Discover its geographic reach, including Savannah, Hinesville, and Brunswick. Understand dialing procedures (10-digit required), supported services like VoIP, and regulatory oversight by the Georgia PSC/FCC. Projections suggest a potential overlay around 2029.

Area code 949 serves Southern Orange County, California. It covers Aliso Viejo, Irvine, Newport Beach & more. Learn about telecom services (local/long distance, internet, mobile), CPUC regulation, and its 1998 split from 714. Includes Pacific Time Zone (UTC-8) info.

Area code 479 serves northwestern Arkansas, including Fayetteville. This guide details its history (established 2002 from 501), geography (Benton, Washington counties), and telecom practices. Learn about 7-digit local dialing, FCC/APSC regulatory oversight, and VoIP service options. Essential for technical understanding.

Explore Oregon's area code 503, covering Portland metro & NW Oregon. Understand its geographic reach across Clackamas, Multnomah & Washington counties. Learn mandatory 10-digit dialing due to the 971 overlay. Originally statewide in 1947, now serving 2.5M+ in key metro areas.

Area Code 909 serves Southern CA, including Chino, Ontario & San Bernardino. Understand its NANPA regulatory framework requiring 10-digit dialing. Covers San Bernardino, Los Angeles & Riverside counties. Established in 1992 from 714; overlaid with 840 in 2021. Learn about number pooling and avoiding common dialing pitfalls.

Explore Louisiana's area code 337, serving Lafayette, Lake Charles & New Iberia. Understand its telecom services: landline, wireless & VoIP. Key info on the 2021 ten-digit dialing change for the 988 lifeline. NANPA regulatory oversight explained. Established in 1999 from area code 318 split.

Area code 850 covers Northwest Florida, from the Alabama border to the Apalachicola River. This guide details dialing patterns (10D/1+10D), regulatory info (NANP/FCC), and key cities like Pensacola and Tallahassee. Learn the geographic scope and call routing for the 850 region.

Explore area code 510's technical details in Alameda, CA, including Oakland & Berkeley. Learn its 1991 origin, the 341 overlay, & mandatory 10-digit dialing. Get lat/long: 37.76521°N, -122.24164°W. Understand CPUC regulations & East Bay's tech-driven economy.

Explore Delaware's area code 302, the state's sole telecom identifier since 1947. Understand its geographic coverage (Dover: 39.15°N), major carriers (Verizon: 40%), numbering capacity (7.92M), and projected 2033 exhaust date. Learn about 10-digit dialing and NANPA regulatory oversight.