Area code
317
317 is a United States area code. Under the North American Numbering Plan it belongs to Indiana, which has 8 area codes in total.
Validate a number in 317
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
Digits with or without punctuation work. Numbers outside the US are read with the +country code.
Area code 317 at a glance
NANPA lists 785 central office codes (prefixes) in use in area code 317, held by 31 holders across 37 rate centers.
| Fact | Value |
|---|---|
| In service since | 1947-01-01 |
| Time zone | Eastern (E) |
| Assigned overlays | 463 (2016-11-15) |
| Prefixes in use | 785 |
| Pooled prefixes | 490 (62%) |
| Rate centers | 37 |
| Companies holding prefixes | 31 |
| Assignment dates on file | 2001-01-22 to 2026-06-09 (224 prefixes) |
| ZIP codes in its places | 29 |
Rate centers in area code 317
The largest rate center is INDIANAPLS, with 509 prefixes (65%).
| Rate center | Prefixes | Share |
|---|---|---|
| INDIANAPLS | 509 | 65% |
| CARMEL | 43 | 5% |
| FISHERS | 34 | 4% |
| GREENWOOD | 22 | 3% |
| NOBLESVL | 16 | 2% |
| GREENFIELD | 14 | 2% |
| PLAINFIELD | 14 | 2% |
| FRANKLIN | 12 | 2% |
| 29 other rate centers | 121 | 15% |
Who holds the prefixes in 317
Indiana Bell Tel CO holds the most prefixes, 297 (38%). 62% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Indiana Bell Tel CO | 297 | 38% |
| Verizon Wireless | 80 | 10% |
| Omnipoint Communications Midwest Operations | 79 | 10% |
| New Cingular Wireless PCS | 65 | 8% |
| Level 3 Communications | 35 | 4% |
| Paetec Itel | 31 | 4% |
| 25 other carriers | 198 | 25% |
A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. Find which carrier a number is on, or browse the prefix holders.
History of area code 317
- 1947-01-01 Area code 317 went into service.
- 1997-02-01 Area code 765 went into service and names 317 as its parent.
- 2016-11-15 Area code 463 went into service as an overlay in the same area as 317.
Area codes nearest to 317
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
- 765 about 24 mi
- 812 about 91 mi
- 930 about 93 mi
- 283 about 98 mi
- 513 about 98 mi
Overlay codes in the same area
ZIP codes in area code 317
29 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Carmel, IN | 3 |
| Fishers, IN | 3 |
| Greenwood, IN | 2 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 317 numbers
3,263 FCC complaints are on file for 2,368 numbers in 317, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 107 |
| 2024 | 94 |
| 2025 | 114 |
Other area codes in Indiana
Indiana is one state with 8 area codes in the NANPA table. 317 is one of them.
Next to 317 in the numbering table
These are the codes just before and after 317 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 317 was first assigned in Indiana. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Indiana next to a 317 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 317
Where is area code 317?
NANPA assigns area code 317 to Indiana, United States.
In which state does area code 317 sit?
Indiana. 317 is one of 8 area codes the NANPA table assigns to the state.
Which places does area code 317 cover?
The places with the most ZIP codes among the rate centers in 317 are Carmel, IN, Fishers, IN and Greenwood, IN. The rate center list on this page shows all of them.
Who owns area code 317?
NANPA assigns area codes. Within 317, Indiana Bell Tel CO holds the most prefixes, 297 prefixes or 38%.
Which time zone does 317 use?
The NANPA NPA report lists the time zone for 317 as Eastern (E).
What year did 317 enter service?
The NANPA NPA report gives an in-service date of 1947-01-01, so 317 has been in use since 1947.
Does area code 317 have an overlay?
Yes. 463 (in service 2016-11-15) shares the same area with 317, so numbers from all of them are local to each other.
Which area codes are nearest to 317?
The area codes closest to 317, measured between the centers of the ZIP code places they serve, are 765 (about 24 miles), 812 (about 91 miles), 930 (about 93 miles), 283 (about 98 miles) and 513 (about 98 miles).
How many prefixes does area code 317 have?
NANPA's report dated 2026-10-17 lists 785 prefixes in service in 317, spread over 37 rate centers and 31 holders.
Are there complaints about 317 numbers?
The FCC data on file has 3,263 complaints for 2,368 numbers in 317. They are unverified consumer reports. A number with no complaints on file is not proven safe.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.