Area Code 415: Comprehensive Guide to Technical Specifications and Data
Info: Area code 415 encompasses San Francisco and its northern suburbs in Marin County, California. As part of the North American Numbering Plan (NANP), it was one of the original area codes established in 1947.
Technical Specifications of Area Code 415
- NPA Code: 415
- Type: Overlay
- Implementation Date: 1947
- State: California
Geographic Coverage
Area code 415 serves the city of San Francisco, Marin County, and parts of San Mateo County.
Major Cities
- Novato, California
- Latitude: 38.10742
- Longitude: -122.5697
- San Anselmo, California
- Latitude: 37.97465
- Longitude: -122.56164
- South San Francisco, California
- Latitude: 37.65466
- Longitude: -122.40775
- San Rafael, California
- Latitude: 37.97353
- Longitude: -122.53109
Numbering Statistics
- Total Numbers Available: [Number]
- Utilization Rate: [Percentage]
- Exhaust Projection: [Date]
Network Infrastructure
Major Carriers
[List of major carriers with market share percentages]
Services Offered
- Landline
- Wireless
- VoIP
Regulatory Framework
- Regulatory Body: California Public Utilities Commission (CPUC)
- Dialing Requirements: Ten-digit dialing mandatory, eleven-digit dialing necessary from landlines.
- NANPA Regulations: Compliance with NANPA guidelines for area code overlays and number allocation.
Historical Milestones
- 1947: Area code 415 established as one of the original North American area codes.
- 1950: Boundaries redrawn, Sacramento renumbered to area code 916.
- 1959: Area code 707 created from the northern part of 415.
- 1991: Area code 510 created for the East Bay.
- 1997: Area code 650 created, partitioning San Francisco and San Mateo County.
- 2015: Area code 628 added as an overlay to 415.
Conclusion
Area code 415 plays a crucial role in California's telecommunications landscape, covering key regions like San Francisco and Marin County. Its evolution through splits and overlays highlights the area's rapid growth and demand for telecommunication services. The addition of area code 628 ensures continued availability of numbers in this densely populated region.