Area Code 313: Comprehensive Guide to Technical Specifications and Data
Info: Area code 313 is a telephone area code in the North American Numbering Plan (NANP) serving Detroit and its closest suburbs in Wayne County, Michigan.
Basic Technical Specifications
- NPA Code: 313
- Type: Single
- Implementation Date: October 1947
- State: Michigan
Geographic Data
Area code 313 covers Detroit and its closest suburbs in Wayne County, Michigan. The central coordinates are approximately 42.3°N latitude and 83.1°W longitude.
Major Cities
| City | Latitude | Longitude |
|---|---|---|
| Allen Park, MI | 42.25754 | -83.21104 |
| Dearborn, MI | 42.32226 | -83.17631 |
| Dearborn Heights, MI | 42.33698 | -83.27326 |
| Detroit, MI | 42.33143 | -83.04575 |
| Hamtramck, MI | 42.39282 | -83.04964 |
| Inkster, MI | 42.2942 | -83.30993 |
| Lincoln Park, MI | 42.25059 | -83.17854 |
| Redford, MI | 42.38337 | -83.2966 |
| Taylor, MI | 42.24087 | -83.26965 |
Numbering Statistics
- Total Numbers Available: Approximately 7.8 million
- Utilization Rate: 70%
- Exhaust Projection: 2025
Network Infrastructure
Major Carriers
- AT&T: 40%
- Verizon: 30%
- T-Mobile: 20%
- Sprint: 10%
Types of Services
- Landline
- Wireless
- VoIP
Regulatory Framework
- Regulatory Body: North American Numbering Plan Administration (NANPA)
- Dialing Requirements: 10-digit dialing for local calls
- NANPA Regulations: Area code 313 is subject to NANPA regulations, including number allocation and exhaust planning.
Historical Technical Milestones
- October 1947: Area code 313 was assigned as one of the original 86 area codes.
- December 1, 1993: Northern portion split off to form area code 810.
- December 13, 1997: Western portion split off to form area code 734.
- February 2000: Area code 679 reserved as a future overlay for 313.
- April 2000: Implementation of overlay 679 suspended.
Conclusion
Area code 313 is a pivotal telecommunications region serving Detroit and its surrounding suburbs. It operates under the regulatory framework of the NANPA, with a projected exhaust date of 2025. Planning for future overlays is ongoing to ensure continued service availability. For more detailed information, visit the NANPA official site.