---
title: "Area code 737: Texas, United States"
url: "https://lookvalid.com/area-code/737.md"
canonical_url: "https://lookvalid.com/area-code/737"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 737 serves Texas, United States. Number formats, numbering rules, a live phone validator and the other codes in Texas."
---

# Area code 737: Texas, United States

Area code 737 serves Texas, United States. Number formats, numbering rules, a live phone validator and the other codes in Texas.

NANPA lists 322 central office codes (prefixes) in use in area code 737, held by 44 holders across 35 rate centers.
The largest rate center is AUSTIN, with 148 prefixes (46%).
Onvoy holds the most prefixes, 77 (24%). 100% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 1,144 complaints on file for 895 numbers in 737, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 2013-07-01
- Time zone: Central (C)
- Assigned overlays: 512 (1947-01-01)
- Prefixes in use: 322
- Pooled prefixes: 322 (100%)
- Rate centers: 35
- Companies holding prefixes: 44
- Assignment dates on file: 2013-02-19 to 2026-06-02 (300 prefixes)
- ZIP codes in its places: 107

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| AUSTIN | 148 | 46% |
| GEORGETOWN | 19 | 6% |
| BASTROP | 18 | 6% |
| SAN MARCOS | 13 | 4% |
| KYLE | 10 | 3% |
| LEANDER | 10 | 3% |
| ELGIN | 9 | 3% |
| TAYLOR | 8 | 2% |
| 27 other rate centers | 87 | 27% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Onvoy | 77 | 24% |
| T-Mobile USA | 31 | 10% |
| New Cingular Wireless PCS | 28 | 9% |
| Verizon Wireless | 28 | 9% |
| Fractel | 26 | 8% |
| Bandwidth.com CLEC | 21 | 7% |
| 38 other carriers | 111 | 34% |

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 512, named as the parent of 737 in the NANPA report, was in service.
- 2013-07-01: Area code 737 went into service.

## Nearest area codes

The area codes closest to 737, measured between the centers of the ZIP code places they serve, are 210 (about 76 miles), 726 (about 76 miles), 830 (about 86 miles), 254 (about 89 miles) and 979 (about 93 miles).

## ZIP codes

107 ZIP codes fall in places that have a rate center in this area code. The places with the most are Austin, TX (74 ZIP codes), Georgetown, TX (4 ZIP codes) and Leander, TX (3 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

1,144 complaints for 895 numbers. Numbers whose latest complaint falls in each year:

- 2023: 57
- 2024: 97
- 2025: 85

## Questions

### Where is area code 737?

NANPA assigns area code 737 to Texas, United States.

### In which state does area code 737 sit?

Texas. 737 is one of 29 area codes the NANPA table assigns to the state.

### Which places does area code 737 cover?

The places with the most ZIP codes among the rate centers in 737 are Austin, TX, Georgetown, TX and Leander, TX. The rate center list on this page shows all of them.

### Who owns area code 737?

NANPA assigns area codes. Within 737, Onvoy holds the most prefixes, 77 prefixes or 24%.

### Which time zone does 737 use?

The NANPA NPA report lists the time zone for 737 as Central (C).

### What year did 737 enter service?

The NANPA NPA report gives an in-service date of 2013-07-01, so 737 has been in use since 2013.

### Does area code 737 have an overlay?

Yes. 512 (in service 1947-01-01) shares the same area with 737, so numbers from all of them are local to each other.

### Which area codes are nearest to 737?

The area codes closest to 737, measured between the centers of the ZIP code places they serve, are 210 (about 76 miles), 726 (about 76 miles), 830 (about 86 miles), 254 (about 89 miles) and 979 (about 93 miles).

### How many prefixes does area code 737 have?

NANPA's report dated 2026-10-17 lists 322 prefixes in service in 737, spread over 35 rate centers and 44 holders.

### Are there complaints about 737 numbers?

The FCC data on file has 1,144 complaints for 895 numbers in 737. 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).