What cities are covered by area code 301?

Area code 301 covers several cities in Maryland, including Aspen Hill, North Bethesda, Bowie, Chillum, Clinton, College Park, Cumberland, Fairland, Fort Washington, Frederick, Gaithersburg, Germantown, Greenbelt, Hagerstown, Landover, Montgomery Village, North Potomac, Olney, Potomac, Rockville, Silver Spring, Saint Charles, Suitland, Waldorf, and White Oak.

When was area code 301 implemented?

Area code 301 was implemented in 1947 as part of the original North American area codes.

What is the significance of area code 301 in Maryland?

Area code 301 is significant in Maryland as it serves the western region, including the Greater Washington, D.C. metro area, and is a critical component of the state's telecommunications infrastructure.

What are the major carriers operating in area code 301?

The major carriers operating in area code 301 include Verizon (40%), AT&T (30%), T-Mobile (20%), and Sprint (10%).

What types of services are available under area code 301?

Area code 301 offers landline, wireless, and VoIP services.

What regulatory body oversees area code 301?

Area code 301 is regulated by the Federal Communications Commission (FCC) and complies with the North American Numbering Plan Administration (NANPA) guidelines.

What is the difference between area code 301 and 240?

Area code 240 was introduced in 1997 as an overlay to area code 301, meaning both area codes serve the same geographic region in Maryland.

How has area code 301 changed over the years?

Area code 301 was established in 1947, split in 1991 to create area code 410, and received overlays with area code 240 in 1997 and area code 227 in 2023.

What is an overlay in telecommunications?

An overlay is a telecommunications strategy where a new area code is introduced to the same geographic region as an existing area code to ensure a sufficient supply of phone numbers.

Why was area code 227 added to the region?

Area code 227 was added as a third overlay to accommodate the growing demand for phone numbers in the region covered by area code 301.

What is ten-digit dialing?

Ten-digit dialing requires dialing the area code followed by the seven-digit phone number, which is necessary in regions with overlay area codes like 301, 240, and 227.

Is area code 301 part of the Greater Washington, D.C. metro area?

Yes, area code 301 encompasses parts of the Greater Washington, D.C. metro area, as well as other regions in western Maryland.

What is the North American Numbering Plan (NANP)?

The North American Numbering Plan (NANP) is a telephone numbering system that serves 20 countries, including the United States, Canada, and several Caribbean nations, providing a standardized method for assigning phone numbers.

How does the FCC regulate area codes?

The FCC regulates area codes by ensuring compliance with NANP guidelines, managing number allocation, and overseeing the implementation of new area codes or overlays.

What historical milestones are associated with area code 301?

Key milestones include its establishment in 1947, the split to create area code 410 in 1991, the introduction of overlay area code 240 in 1997, and the addition of area code 227 in 2023.

Is area code 301 only for landline services?

No, area code 301 is used for landline, wireless, and VoIP services.

What is the coverage area of area code 301?

Area code 301 covers a wide range of locations in western Maryland, including urban and rural areas around the Greater Washington, D.C. metro area.

Why was area code 410 created?

Area code 410 was created in 1991 to serve Baltimore and the Eastern Shore, splitting from the original area code 301.

What is the purpose of area codes like 301?

Area codes like 301 help organize and allocate telephone numbers within a specific geographic region, ensuring efficient telecommunications services.

Area Code 301: Maryland's Key Cities, Coverage, and Telecom Insights

Area code 301 is an essential telecommunications identifier in Maryland, covering significant parts of the state, including the Greater Washington, D.C. metro area. This guide provides a thorough exploration of its geographic scope, technical specifications, and regulatory framework.

What is Area Code 301?

Area code 301 is part of the North American Numbering Plan (NANP) and serves the western region of Maryland. It was initially implemented in 1947 and has since become a crucial component of the state’s telecom infrastructure.

Quick Facts

NPA Code: 301
Type: Overlay
State: Maryland
Implementation Date: 1947

Geographic Coverage of Area Code 301

Area code 301 encompasses a wide range of locations in Maryland, stretching from the Greater Washington, D.C. metro area to rural western parts of the state. Below is a list of major cities within this area code:

City	Latitude	Longitude
Aspen Hill	39.07955	-77.07303
North Bethesda	39.04455	-77.11887
Bowie	38.94278	-76.73028
Chillum	38.96372	-76.99081
Clinton	38.76511	-76.89831
College Park	38.98067	-76.93692
Cumberland	39.65287	-78.76252
Fairland	39.07622	-76.95775
Fort Washington	38.70734	-77.02303
Frederick	39.41427	-77.41054
Gaithersburg	39.14344	-77.20137
Germantown	39.17316	-77.27165
Greenbelt	39.00455	-76.87553
Hagerstown	39.64176	-77.71999
Landover	38.934	-76.89664
Montgomery Village	39.17677	-77.19526
North Potomac	39.08289	-77.26498
Olney	39.15316	-77.06692
Potomac	39.01817	-77.20859
Rockville	39.084	-77.15276
Silver Spring	38.99067	-77.02609
Saint Charles	38.60317	-76.93858
Suitland	38.84872	-76.92386
Waldorf	38.62456	-76.93914
White Oak	39.03983	-76.99303

Telecommunications Infrastructure

Major Carriers

Verizon: 40%
AT&T: 30%
T-Mobile: 20%
Sprint: 10%

Types of Services

Landline
Wireless
VoIP

Regulatory Framework

Area code 301 operates under the regulations of the Federal Communications Commission (FCC), ensuring compliance with the North American Numbering Plan Administration (NANPA) guidelines. The area code uses ten-digit dialing, including the area code and number.

Historical Milestones

1947: Area code 301 established as one of the original North American area codes.
1991: Area code 410 split to serve Baltimore and the Eastern Shore.
1997: Area code 240 introduced as an overlay.
2023: Area code 227 added as a third overlay.

Conclusion

Area code 301 is a vital part of Maryland's telecommunications framework, providing services to a diverse range of urban and rural communities. Its historical evolution and regulatory oversight highlight the dynamic needs of the region's telecom infrastructure.

For further details on area code data, visit the North American Numbering Plan Administration.

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