---
title: "Area code 817: Texas, United States"
url: "https://lookvalid.com/area-code/817.md"
canonical_url: "https://lookvalid.com/area-code/817"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 817 serves Texas, United States. Number formats, numbering rules, a live phone validator and the other codes in Texas."
---

# Area code 817: Texas, United States

Area code 817 serves Texas, United States. Number formats, numbering rules, a live phone validator and the other codes in Texas.

NANPA lists 780 central office codes (prefixes) in use in area code 817, held by 34 holders across 26 rate centers.
Southwestern Bell holds the most prefixes, 300 (38%). 60% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 5,004 complaints on file for 3,977 numbers in 817, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1953-01-01
- Time zone: Central (C)
- Assigned overlays: 682 (2000-10-07)
- Prefixes in use: 780
- Pooled prefixes: 466 (60%)
- Rate centers: 26
- Companies holding prefixes: 34
- Assignment dates on file: 2001-01-16 to 2026-03-02 (122 prefixes)
- ZIP codes in its places: 107

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| ARLINGTON | 228 | 29% |
| FORT WORTH | 192 | 25% |
| GLENDALE | 64 | 8% |
| EULESS | 47 | 6% |
| GRAPEVINE | 36 | 5% |
| NRICHLDHLS | 33 | 4% |
| ROANOKE | 22 | 3% |
| WEATHERFD | 21 | 3% |
| 18 other rate centers | 137 | 18% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Southwestern Bell | 300 | 38% |
| New Cingular Wireless PCS | 88 | 11% |
| T-Mobile USA | 54 | 7% |
| Level 3 Communications | 45 | 6% |
| Onvoy | 43 | 6% |
| Mcimetro Access Transmission Services | 30 | 4% |
| 28 other carriers | 220 | 28% |

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

- 1953-01-01: Area code 817 went into service.
- 1997-05-25: Area code 254 went into service and names 817 as its parent.
- 1997-05-25: Area code 940 went into service and names 817 as its parent.
- 2000-10-07: Area code 682 went into service as an overlay in the same area as 817.

## Nearest area codes

The area codes closest to 817, measured between the centers of the ZIP code places they serve, are 214 (about 29 miles), 469 (about 30 miles), 945 (about 30 miles), 972 (about 30 miles) and 940 (about 71 miles).

## ZIP codes

107 ZIP codes fall in places that have a rate center in this area code. The places with the most are Fort Worth, TX (56 ZIP codes), Arlington, TX (19 ZIP codes) and Denton, TX (10 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

5,004 complaints for 3,977 numbers. Numbers whose latest complaint falls in each year:

- 2023: 240
- 2024: 164
- 2025: 144

## Questions

### Where is area code 817?

NANPA assigns area code 817 to Texas, United States.

### In which state does area code 817 sit?

Texas. 817 is one of 29 area codes the NANPA table assigns to the state.

### Which places does area code 817 cover?

The places with the most ZIP codes among the rate centers in 817 are Fort Worth, TX, Arlington, TX and Denton, TX. The rate center list on this page shows all of them.

### Who owns area code 817?

NANPA assigns area codes. Within 817, Southwestern Bell holds the most prefixes, 300 prefixes or 38%.

### Which time zone does 817 use?

The NANPA NPA report lists the time zone for 817 as Central (C).

### What year did 817 enter service?

The NANPA NPA report gives an in-service date of 1953-01-01, so 817 has been in use since 1953.

### Does area code 817 have an overlay?

Yes. 682 (in service 2000-10-07) shares the same area with 817, so numbers from all of them are local to each other.

### Which area codes are nearest to 817?

The area codes closest to 817, measured between the centers of the ZIP code places they serve, are 214 (about 29 miles), 469 (about 30 miles), 945 (about 30 miles), 972 (about 30 miles) and 940 (about 71 miles).

### How many prefixes does area code 817 have?

NANPA's report dated 2026-10-17 lists 780 prefixes in service in 817, spread over 26 rate centers and 34 holders.

### Are there complaints about 817 numbers?

The FCC data on file has 5,004 complaints for 3,977 numbers in 817. 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).