The 317 area code covers Indianapolis, Carmel and 30 more places in Indiana.
Area code 317 is in Indiana, on Eastern Time. In the 317 area, phone numbers are given out most in Marion County, then Hamilton and Johnson counties. It has been in service since 1947. 463 covers the same area, so two neighbours can have different area codes.
- Where
- 8 counties in Indiana, mostly Marion County, Hamilton County and Johnson County
- Time zone
- Eastern Time
- In service since
- 1947, one of the original area codes
- Shares its area with
- 463 (since 2016)
- Prefixes in use
- 785
- How to dial
- Local calls need all 10 digits: 317-555-0142.
Find out who called you from a 317 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (317) number is on today, use our free carrier lookup.
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Indianapolis holds 65% of the phone prefixes in area code 317.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 785 prefixes in use shows where 317 numbers are actually given out.
- Indianapolis509 prefixes, 65%
- Carmel43 prefixes, 5%
- Fishers34 prefixes, 4%
- Greenwood22 prefixes, 3%
- Noblesville16 prefixes, 2%
- Plainfield14 prefixes, 2%
- Greenfield14 prefixes, 2%
- Franklin12 prefixes, 2%
Also served: Shelbyville, Brownsburg, West Newton and Zionsville and 20 smaller places.
Indiana Bell (AT&T) holds the most phone number prefixes in area code 317: 296 of 785.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 785 prefixes in use in 317 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Indiana Bell (AT&T)AT&T's landline company | 296 | 38% |
| T-MobileMobile network | 80 | 10% |
| AT&T MobilityMobile network | 65 | 8% |
| Level 3 (Lumen)Lumen's business and wholesale network | 57 | 7% |
| PAETEC (Windstream)Windstream's business phone network | 31 | 4% |
| Teleport (AT&T)AT&T's business phone network | 25 | 3% |
| 23 other carriers | 231 | 29% |
63% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
317 has been split once and overlaid once since 1947.
1947
317 is one of the original North American area codes.
1997
On February 1, 1997, 765 splits off and takes part of the 317 area.
2016
On November 15, 2016, 463 is added on top of 317, so new numbers here can get either code.
A 317 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 317 are 765, 812 and 219.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
Indiana has 7 other area codes.
These are the questions people ask most about area code 317.
Where is area code 317?
317 covers Indianapolis, Carmel, Fishers and Greenwood and 28 more places in Indiana. In the 317 area, phone numbers are given out most in Marion County, then Hamilton and Johnson counties.
What state is area code 317 in?
Indiana. 317 is an Indiana area code on Eastern Time.
What cities use area code 317?
The places holding the most 317 prefixes are Indianapolis, Carmel, Fishers, Greenwood, Noblesville, Plainfield, Greenfield and Franklin, out of 32 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 317?
No single phone company owns 317. NANPA's records show Indiana Bell (AT&T) holds the most 317 prefixes, 296 of 785, followed by T-Mobile and AT&T Mobility. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 317 in?
317 is on Eastern Time.
When did area code 317 start?
317 is one of the original North American area codes, in service since 1947.
Is 317 the same area as 463?
Yes. 463 (since 2016) covers the same ground as 317. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 317 number?
Local calls need all 10 digits: 317-555-0142.
Is 317 a toll-free number?
No. 317 is a regular area code for Indianapolis and Carmel in Indiana, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 317?
The closest are 765 (Lafayette, Indiana), 812/930 (Evansville, Indiana), 219 (Gary, Indiana) and 513/283 (Cincinnati, Ohio), measured between the centres of each area.
Who called me from a 317 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 317 a scam?
317 is a real Indiana area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.