---
title: "Area code 346: Texas, United States"
url: "https://lookvalid.com/area-code/346.md"
canonical_url: "https://lookvalid.com/area-code/346"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 346 serves Texas, United States. Number formats, numbering rules, a live phone validator and the other codes in Texas."
---

# Area code 346: Texas, United States

Area code 346 serves Texas, United States. Number formats, numbering rules, a live phone validator and the other codes in Texas.

NANPA lists 737 central office codes (prefixes) in use in area code 346, held by 53 holders across 45 rate centers.
Onvoy holds the most prefixes, 126 (17%). 100% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 1,703 complaints on file for 1,382 numbers in 346, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 2014-07-01
- Time zone: Central (C)
- Assigned overlays: 713 (1947-01-01), 281 (1996-11-02), 832 (1999-01-16), 621 (2025-01-23)
- Prefixes in use: 737
- Pooled prefixes: 734 (100%)
- Rate centers: 45
- Companies holding prefixes: 53
- Assignment dates on file: 2014-01-15 to 2026-08-06 (720 prefixes)
- ZIP codes in its places: 239

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| HOUSTON | 173 | 23% |
| HSTNSUBURB | 69 | 9% |
| BAMMEL | 57 | 8% |
| LANGHAMCRK | 47 | 6% |
| SPRING | 35 | 5% |
| CYPRESS | 32 | 4% |
| RICHMNRNBG | 26 | 4% |
| SUGAR LAND | 22 | 3% |
| 37 other rate centers | 276 | 37% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Onvoy | 126 | 17% |
| Aerial Communications | 121 | 16% |
| New Cingular Wireless PCS | 84 | 11% |
| Verizon Wireless | 72 | 10% |
| Bandwidth.com CLEC | 45 | 6% |
| Fractel | 40 | 5% |
| 47 other carriers | 249 | 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

- 1999-01-16: Area code 832, named as the parent of 346 in the NANPA report, was in service.
- 2014-07-01: Area code 346 went into service.
- 2025-01-23: Area code 621 went into service as an overlay in the same area as 346.

## Nearest area codes

The area codes closest to 346, measured between the centers of the ZIP code places they serve, are 979 (about 53 miles), 936 (about 73 miles), 409 (about 78 miles), 512 (about 144 miles) and 737 (about 144 miles).

## ZIP codes

239 ZIP codes fall in places that have a rate center in this area code. The places with the most are Houston, TX (178 ZIP codes), Spring, TX (12 ZIP codes) and Katy, TX (6 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

1,703 complaints for 1,382 numbers. Numbers whose latest complaint falls in each year:

- 2023: 123
- 2024: 162
- 2025: 108

## Questions

### Where is area code 346?

NANPA assigns area code 346 to Texas, United States.

### In which state does area code 346 sit?

Texas. 346 is one of 29 area codes the NANPA table assigns to the state.

### Which places does area code 346 cover?

The places with the most ZIP codes among the rate centers in 346 are Houston, TX, Spring, TX and Katy, TX. The rate center list on this page shows all of them.

### Who owns area code 346?

NANPA assigns area codes. Within 346, Onvoy holds the most prefixes, 126 prefixes or 17%.

### Which time zone does 346 use?

The NANPA NPA report lists the time zone for 346 as Central (C).

### What year did 346 enter service?

The NANPA NPA report gives an in-service date of 2014-07-01, so 346 has been in use since 2014.

### Does area code 346 have an overlay?

Yes. 713 (in service 1947-01-01), 281 (in service 1996-11-02), 832 (in service 1999-01-16) and 621 (in service 2025-01-23) share the same area with 346, so numbers from all of them are local to each other.

### Which area codes are nearest to 346?

The area codes closest to 346, measured between the centers of the ZIP code places they serve, are 979 (about 53 miles), 936 (about 73 miles), 409 (about 78 miles), 512 (about 144 miles) and 737 (about 144 miles).

### How many prefixes does area code 346 have?

NANPA's report dated 2026-10-17 lists 737 prefixes in service in 346, spread over 45 rate centers and 53 holders.

### Are there complaints about 346 numbers?

The FCC data on file has 1,703 complaints for 1,382 numbers in 346. 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).