Area Code 317: Comprehensive Guide to Central Indiana's Telecommunication Hub
Area code 317 is a vital part of the North American Numbering Plan (NANP), serving Indianapolis and its suburbs in central Indiana since 1947.
Overview of Area Code 317
Basic Technical Specifications
- NPA Code: 317
- Type: Overlay (with area code 463)
- Implementation Date: 1947
- State: Indiana
Geographic Coverage
- Coordinates: 39.768333°N, 86.158056°W
- Area Served: Central Indiana, including Indianapolis and nine surrounding counties (Marion, Boone, Hancock, Hamilton, Hendricks, Johnson, Madison, Morgan, and Shelby)
Numbering and Network Details
Numbering Statistics
- Total Numbers Available: Data not provided
- Utilization Rate: Data not provided
- Exhaust Projection: 2017 (projected)
Network Infrastructure
Regulatory and Historical Context
Regulatory Framework
- Regulatory Body: Indiana Utility Regulatory Commission (IURC)
- Dialing Requirements: Ten-digit dialing mandatory since October 15, 2016
- NANPA Regulations: Compliance with North American Numbering Plan Administration (NANPA) guidelines
Historical Technical Milestones
- 1947: Area code 317 established, covering the northern two-thirds of Indiana.
- 1948: Area code 317 reduced to central Indiana; northern Indiana assigned area code 219.
- 1997: Area code 765 created, reducing the geographic coverage of area code 317.
- 2016: Area code 463 introduced as an overlay, making ten-digit dialing mandatory.
Conclusion
Area code 317 remains a cornerstone of the telecommunications infrastructure in central Indiana, efficiently serving the Indianapolis metropolitan area and its surrounding counties. The introduction of area code 463 as an overlay ensures the region can meet increasing numbering demands while adhering to NANPA regulations.