Indiana · Eastern Time
317 Area Code
Area code 317 is in Indiana, serving Indianapolis and surrounding central Indiana suburbs. It is in the Eastern Time zone. It shares its territory with overlay code 463, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 317 area code?
317 is a Indiana area code covering Indianapolis and surrounding central Indiana suburbs. In the wider directory it sits in the Midwest region.
Cities in the 317 area code
- Indianapolis
- Carmel
- Fishers
- Noblesville
- Greenwood
- Lawrence
- Westfield
- Plainfield
- Brownsburg
- Avon
- Zionsville
- Franklin
- Greenfield
- Shelbyville
Counties served by 317
Marion County, Hamilton County, Hendricks County, Johnson County, Hancock County, Boone County, Shelby County and Morgan County.
Time zone note: Most of Indiana is Eastern; counties near Chicago and Evansville observe Central.
317 overlay codes and dialing
The 317 territory is covered by an overlay of 2 area codes: 317, 463. All of them serve the same geographic area, and the original code is 317. Because more than one code covers the same ground, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes.
History of the 317 area code
317 is one of the original area codes assigned in 1947, when AT&T and Bell Laboratories created the North American Numbering Plan and divided the country into the first 86 numbering plan areas. It has served the Indianapolis area ever since, with 463 later added as an overlay to supply more numbers.
Is 317 a scam or spam risk?
317 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 317 number on your screen is no guarantee the caller is in Indianapolis, IN or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other Indiana area codes
Explore more
See every code in Indiana, compare codes across the Midwest region, or view all Eastern Time codes. You can also browse the 3XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
317 area code FAQ
Where is the 317 area code?
The 317 area code is in Indiana, covering Indianapolis and surrounding central Indiana suburbs, in the Midwest region.
What cities are in the 317 area code?
Cities in the 317 area code include Indianapolis, Carmel, Fishers, Noblesville, Greenwood, Lawrence, Westfield, Plainfield, Brownsburg and Avon.
What time zone is 317 in?
317 is in the Eastern Time zone. Most of Indiana is Eastern; counties near Chicago and Evansville observe Central.
What is the overlay for the 317 area code?
317 shares its territory with 463. Both codes (317, 463) serve the same area, so 10-digit dialing is required for every call.
When did the 317 area code start?
317 went into service on January 1, 1947 as one of the original 1947 North American area codes.
Do I have to dial 10 digits for 317?
Yes. Because 317 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 317 a toll-free or premium code?
No. 317 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.