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Indiana Office of Utility Consumer Counselor

OUCC > Telecommunications > Cases of Note > 317 Area Code Relief: Changes Are Coming 317 Area Code Relief: Changes Are Coming

The 317 telephone area code serving Indianapolis and most of its suburbs is low on available numbers and is projected to run out in 2017. As a result, the new 463 area code will be added in 2016.

  • The Indiana Utility Regulatory Commission (IURC) has approved the use of the "all-services overlay" method for adding the new code.
  • The telecommunications industry and the Indiana Office of Utility Consumer Counselor (OUCC) both recommended the all-services overlay approach.
  • The OUCC issued a September 24, 2014 news release to invite public comments and to publicize the five public field hearings held in the fall of 2014. The hearings were held in Indianapolis, Carmel, Franklin, Danville, and Greenfield.  

All new area codes introduced in the United States since 2008 have used the overlay method, including the new 930 area code which now overlays the 812 code throughout southern, south-central and western Indiana. 

With the overlay: 

  • All consumers with 317 phone numbers will keep them, with no changes.
  • On a future date to be determined, numbers for new telephone customers will be assigned with the new area code.
  • All customers will dial ten digits for local calls (area code + number), though local calling areas will not change. Calls that are currently local will remain local.
  • Toll calls will still use eleven digits (1 + area code + number).
  • A transition period (likely to last six months) will allow consumers to adjust to 10-digit dialing and make any needed changes. Dates for the transition period will be determined in the near future.
  • Businesses, not-for-profit organizations, government agencies and other customers will not need to incur costs for reprinting signage, stationery, advertising, or business cards because of the area code change. However, 7-digit numbers in fax machines, alarm systems, and other devices and systems will need to be reprogrammed to include the area codes.

For more information on the 317 case:

For more information, in general:

This page will be updated based on future developments.