Area code 317
Area code 317 is a North American Numbering Plan area code for central Indiana. It serves most of the Indianapolis metropolitan area, including Indianapolis itself and Marion County and all or part of Boone, Hancock, Hamilton, Hendricks, Johnson, Madison, Morgan, and Shelby counties.
317 was one of the original area codes introduced in 1947. It originally covered the northern two-thirds of Indiana, while area code 812 served southern Indiana. In the first split of the area code system since its 1947 inception, northern Indiana received 219 the following year. Despite Indianapolis's rapid growth and increased number demand, no further changes were made to 317 until February 1, 1997, when most of the old 317 territory outside of the Indianapolis area switched to 765. As a result, 317 is the only one of Indiana's six area codes that does not border another state.
The number pool for 317 was expected to exhaust in 2017. The Indiana Regulatory Commission announced that an overlay of 317 will go into effect in late spring 2016. The new area code, 463 (which coincidentally also spells out IND), will be assigned to new customers only, making 317 the second area to be overlain in Indiana after 812 was overlain with 930 in March 2015.
- http://www.sbc.com/gen/general?pid=1718&phase=check SBC information. Accessed May 11, 2006
- Russell, John. "New area code, mandatory 10-digit dialing, come to Central Indiana". Indianapolis Star. Retrieved 8 April 2015.
|Indiana area codes: 219, 260, 317, 574, 765, 812/930|
|West: 765||area code 317||East: 765|