Area Code 405: Comprehensive Technical Overview
Area code 405 is pivotal to central Oklahoma, encompassing Oklahoma City and its suburbs. It was established as one of the original area codes in 1947.
Technical Specifications of Area Code 405
- NPA Code: 405
- Type: Single (with overlay 572)
- Implementation Date: January 1, 1947
- State: Oklahoma
Geographic Coverage
Area code 405 spans central Oklahoma, prominently featuring Oklahoma City and its adjacent suburbs.
Numbering Statistics
- Total Numbers Available: Data not specified
- Utilization Rate: Data not specified
- Exhaust Projection: Q2 2021
Network Infrastructure
Regulatory Framework
- Regulatory Body: Oklahoma Corporation Commission
- Dialing Requirements: Ten-digit dialing mandatory since January 2021
- NANPA Regulations: Compliance with North American Numbering Plan Administration (NANPA) guidelines
Historical Milestones
- 1947: Area code 405 established, initially covering the entire state of Oklahoma.
- 1953: Introduction of area code 918, confining 405 to central and western Oklahoma.
- 1997: Creation of area code 580, further focusing 405 on central Oklahoma.
- 2021: Overlay of area code 572 on 405, introducing mandatory ten-digit dialing.
Conclusion
Area code 405 remains a crucial telecommunications hub for central Oklahoma, including Oklahoma City. Since its inception in 1947, it has adapted through various changes to meet the increasing demand for phone numbers. The recent overlay with area code 572 and the shift to ten-digit dialing are part of ongoing efforts to maintain robust service availability.
For further details, visit the official Wikipedia page on Area Code 405.