Area Code 412: Comprehensive Guide to Technical Specifications and Data
Info: Area code 412 is a key telephone area code in the North American Numbering Plan (NANP) serving Pittsburgh, Pennsylvania, and its neighboring regions.
Technical Specifications
- NPA Code: 412
- Type: Overlay
- Implementation Date: 1947
- State: Pennsylvania
Geographic Coverage
Area code 412 encompasses the city of Pittsburgh, most of Allegheny County, and small sections of Washington and Westmoreland counties.
Major Cities Served
- Bethel Park: 40.32757, -80.0395
- McKeesport: 40.34785, -79.86422
- Mount Lebanon: 40.35535, -80.0495
- Monroeville: 40.42118, -79.7881
- Penn Hills: 40.50118, -79.83922
- Pittsburgh: 40.44062, -79.99589
- Plum: 40.50035, -79.74949
- Upper Saint Clair: 40.3359, -80.08339
- West Mifflin: 40.3634, -79.86644
Numbering Statistics
- Total Numbers Available: Not specified
- Utilization Rate: Not specified
- Exhaust Projection: Not specified
Network Infrastructure
Major Carriers
- Verizon
- AT&T
- T-Mobile
- Comcast
Services Offered
- Landline
- Wireless
- VoIP
Regulatory Framework
- Regulatory Body: Pennsylvania Public Utility Commission (PUC)
- Dialing Requirements: Mandatory ten-digit dialing since 2001
- NANPA Regulations: Complies with North American Numbering Plan Administration (NANPA) guidelines
Historical Milestones
- 1947: Area code 412 was established as one of the original North American area codes.
- 1998: Area code 724 was split from 412.
- 2001: Area code 878 was overlaid on 412 and 724.
Conclusion
Area code 412 is integral to the telecommunications framework in southwestern Pennsylvania, particularly for Pittsburgh and its environs. Its evolution through splits and overlays reflects the increasing demand for telephone services.
For more information on area codes and their management, visit the North American Numbering Plan Administration.