317 Area Code is part of 10 counties in the state of Indiana. There are around 12 cities and 41 other places such as towns, cdps and villages in the 317 area code. Area code 317 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Indiana. Below you will find more info about Code and also zip codes, counties, cities and the post offices that belong to this Area Code.
Sources: North American Numbering Plan Administration (NANPA), telecom providers, and the U.S. Census Bureau.