Area code 317, Telephone prefix in Indianapolis, United States
Area code 317 covers Indianapolis and nine surrounding counties in central Indiana, including Marion, Boone, Hancock, and Hamilton. This numbering area serves both urban and rural communities across the region.
The North American Numbering Plan established the prefix in 1947, initially covering the northern two-thirds of Indiana. Later modifications reduced its territory to the Indianapolis metro area and immediate surroundings.
The area code region contains numerous theaters, museums, and performance venues, making Indianapolis a center for arts and entertainment in Indiana.
The introduction of a new overlay prefix in 2016 requires ten-digit dialing for all local calls within the Indianapolis region. Calls within the area need the full prefix and seven-digit number.
Three Fortune 500 companies maintain headquarters in this prefix area: Anthem, Eli Lilly, and Simon Property Group. Together these corporations employ tens of thousands of people across the Indianapolis region.
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