---
title: "Area code 317: Indiana, United States"
url: "https://lookvalid.com/area-code/317.md"
canonical_url: "https://lookvalid.com/area-code/317"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 317 serves Indiana, United States. Number formats, numbering rules, a live phone validator and the other codes in Indiana."
---

# Area code 317: Indiana, United States

Area code 317 serves Indiana, United States. Number formats, numbering rules, a live phone validator and the other codes in Indiana.

NANPA lists 785 central office codes (prefixes) in use in area code 317, held by 31 holders across 37 rate centers.
The largest rate center is INDIANAPLS, with 509 prefixes (65%).
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.
The FCC unwanted-call data has 3,263 complaints on file for 2,368 numbers in 317, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- 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

| 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% |

## Carriers

| 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.

## History

- 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.

## Nearest area codes

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).

## ZIP codes

29 ZIP codes fall in places that have a rate center in this area code. The places with the most are Carmel, IN (3 ZIP codes), Fishers, IN (3 ZIP codes) and Greenwood, IN (2 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes.

## Complaints on file

3,263 complaints for 2,368 numbers. Numbers whose latest complaint falls in each year:

- 2023: 107
- 2024: 94
- 2025: 114

## Questions

### 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.

Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).