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Area Code 317: Everything You Need to Know
Area code 317 serves central Indiana, including Indianapolis, since 1947. It's overlaid by 463, mandating 10-digit dialing since 2016. Explore its history, telecom carriers (AT&T, Verizon), regulatory oversight by IURC, and evolution from its initial northern Indiana coverage. Understand its geographic reach and numbering plan details.
Area Code 317: Everything You Need to Know
Quick Answer: Area code 317 covers central Indiana, including Indianapolis and nearby counties. Established in 1947, it plays a vital role in local telecommunications.
What is Area Code 317?
Area code 317 is part of the North American Numbering Plan (NANP) and has been serving central Indiana, particularly the Indianapolis metropolitan area, since 1947. This area code is essential for both local and long-distance communication within the region.
Key Details
- NPA Code: 317
- Type: Overlay with area code 463
- State: Indiana
- Dialing Requirement: Mandatory ten-digit dialing since October 2016
Geographic Coverage of Area Code 317
Where is Area Code 317 Located?
Area code 317 primarily covers the central part of Indiana, with its heart in Indianapolis. The area code extends to nine surrounding counties, providing a comprehensive communication network for the region.
Major Cities in Area Code 317
- Indianapolis: The state capital and largest city, known for its rich history and vibrant culture.
- Carmel: Recognized for its arts and design district.
- Fishers: A rapidly growing suburb with a family-friendly atmosphere.
- Greenwood: Offers a mix of suburban and urban living.
- Lawrence: Known for Fort Harrison State Park.
- Noblesville: Features a historic downtown and parks.
Technical and Network Insights
Network Infrastructure
Area code 317 is supported by major telecommunications carriers, ensuring robust connectivity across various services:
- AT&T
- Verizon
- T-Mobile
- Sprint
Services Offered
- Landline
- Wireless
- VoIP
Numbering Details
- Total Numbers Available: Not specified
- Utilization Rate: Not specified
- Exhaust Projection: Originally projected for 2017
Regulatory Framework and Historical Context
Who Regulates Area Code 317?
The Indiana Utility Regulatory Commission (IURC) oversees the implementation and regulation of area code 317, ensuring compliance with NANPA regulations.
Historical Milestones
- 1947: Initial implementation covering northern Indiana.
- 1948: Geographic reduction to central Indiana, with northern areas reassigned to area code 219.
- 1997: Further reduction with the introduction of area code 765.
- 2016: Introduction of area code 463 as an overlay, requiring ten-digit dialing.
Conclusion
Area code 317 remains a crucial part of Indiana???s telecommunications landscape, effectively supporting the communication needs of Indianapolis and its surrounding areas. The introduction of the overlay area code 463 ensures that the region can meet growing numbering demands while maintaining compliance with regulatory standards.
Further Information
For more insights on area codes and telecommunications, visit the North American Numbering Plan Administration. Explore related articles to deepen your understanding of Indiana's telecom infrastructure.
Frequently Asked Questions
What area code is Indianapolis, Indiana?
Indianapolis uses area code 317, along with the overlay area code 463. Ten-digit dialing is required.
What cities are included in area code 317 in Indiana?
Besides Indianapolis, area code 317 includes Carmel, Fishers, Greenwood, Lawrence, and Noblesville, among other locations in central Indiana.
What is the overlay area code for 317 in Indiana?
The overlay area code for 317 is 463. It was introduced in 2016 to accommodate the growing need for phone numbers in the region.
When was area code 317 established in Indiana?
Area code 317 was originally implemented in 1947, covering northern Indiana. In 1948 it was reduced to central Indiana.
When did ten-digit dialing become mandatory for area code 317?
Ten-digit dialing (including the area code) became mandatory for 317 and its overlay 463 in October 2016.
What area codes were split from 317 in Indiana?
Area code 219 was split off in 1948 to cover northern Indiana. Area code 765 was introduced in 1997 to cover additional parts of central Indiana previously in area code 317
Who regulates area code 317 in Indiana?
Area code 317 is regulated by the Indiana Utility Regulatory Commission (IURC), which follows NANPA regulations.
Which major cell phone carriers service the 317 area code in Indiana?
Major carriers such as AT&T, Verizon, T-Mobile, and Sprint provide service in the 317 area code region.
What types of phone services are available within Indiana's area code 317?
Area code 317 supports landline, wireless, and VoIP (Voice over IP) phone services.
What is the North American Numbering Plan (NANP) and its connection to 317?
Area code 317 is a part of the North American Numbering Plan (NANP), a system that assigns area codes for telephone services in North America.
Where can I find additional information about area codes?
The North American Numbering Plan Administration (NANPA) website ([https://www.nationalnanpa.com/](https://www.nationalnanpa.com/)) is a good resource for details on area codes and telecommunications.
What area code is Indianapolis Indiana?
Indianapolis, Indiana, uses area code 317. This area code also covers several surrounding counties in the central part of the state and has been in service since 1947, after a geographic reduction. It now shares coverage with overlay area code 463.
How to dial area code 317 from another area code?
Since October 2016, ten-digit dialing is mandatory for calls to and within area code 317. This means you must dial both the area code (317) and the seven-digit phone number, regardless of your location. This change was implemented due to the introduction of the overlay area code 463.
What is area code 317 and its coverage area?
Area code 317 is a North American Numbering Plan (NANP) code serving central Indiana, including Indianapolis and nine surrounding counties. Established in 1947, it originally covered a larger portion of northern Indiana but was reduced to its current area. In 2016, area code 463 was introduced as an overlay.
Why does Indianapolis have two area codes now?
Indianapolis now has two area codes, 317 and 463, due to increasing demand for phone numbers. Area code 463 was added as an overlay in 2016. An overlay adds a new area code to the same geographic region as an existing one (317). The two area codes serve the same region, requiring 10-digit dialing for all calls within and between them.
When should I use 10-digit dialing for 317?
You should always use 10-digit dialing when calling any number within the 317 or 463 area codes. This means dialing both the area code and the seven-digit phone number. Ten-digit dialing has been mandatory in this area since October 2016.
Can I still get a 317 area code number?
Yes, you can likely still get a 317 area code number, but due to increased demand and the introduction of the 463 overlay, new numbers may be assigned with the 463 area code instead. Both area codes serve the same geographic region of central Indiana.
What counties are covered by Indiana area code 317?
Area code 317 covers nine counties in central Indiana. While the article doesn't list all counties, it explicitly names Indianapolis (Marion County) as the primary area of coverage, as well as the surrounding cities of Carmel, Fishers, Greenwood, Lawrence, and Noblesville.
What area code was 317 before 1948?
Before 1948, area code 317 covered a larger portion of northern Indiana. In 1948, the area was reduced to focus on central Indiana. Northern areas previously using 317 were reassigned to area code 219.
What is the area code 463 in Indiana?
Area code 463 is an overlay for area code 317 in central Indiana. It was introduced in 2016 to accommodate the growing need for phone numbers in the Indianapolis metropolitan area and shares the same geographic region as area code 317. It was introduced as an overlay in 2016.
Who regulates area codes in Indiana?
The Indiana Utility Regulatory Commission (IURC) regulates area codes in Indiana, including area codes 317 and 463. They oversee the implementation and operation, ensuring compliance with the North American Numbering Plan Administration (NANPA) regulations.