346
Area code
TX
United States geographic area code, in service since 2014-07-01. Part of the 281/346/621/713/832 overlay complex — ten-digit dialing required.
Statusin service
Introduced2014-07-01
JurisdictionTX, US
Local dialing10D
Time zoneCentral
Last verified2026-09-17
Utilization 96.7% of assignable prefixes assigned
As of 09/17/2026
0%766 of ~792 assignable NXX values (200–999 excl. N11)100%
Prefix-level assignment does not equal number-level exhaustion; thousands-block pooling extends capacity. First assignment on record 2014-01-15, most recent 2026-09-16.
Area codes serve rate-center geographies, not municipal boundaries. “TX” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | ONVOY, LLC - TX | 133 | 17.4% |
| 02 | AERIAL COMMUNICATIONS, INC. | 121 | 15.8% |
| 03 | NEW CINGULAR WIRELESS PCS, LLC - IL | 88 | 11.5% |
| 04 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 72 | 9.4% |
| 05 | BANDWIDTH.COM CLEC, LLC - TX | 45 | 5.9% |
| 06 | FRACTEL, LLC | 40 | 5.2% |
| 07 | COMCAST IP PHONE, LLC | 31 | 4% |
| 08 | METROPCS, INC. | 26 | 3.4% |
| 09 | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 22 | 2.9% |
| 10 | SOUTHWESTERN BELL | 16 | 2.1% |
Important: these are initial assignees from NANPA CO-code records — the carrier a prefix was originally assigned to. Because of number portability, the current serving carrier of any individual number may differ.
Change history
Recorded events for this NPA- 2013-05-30 NPA 346 to Overlay NPAs 281/713/832 (Texas)
- 2014-07-01Area code 346 entered service (created from 832).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2023-12-06 | PL-623 ↗ | NPA 621 to Overlay NPA 281/346/713/832 (Texas) |
| 2013-05-30 | PL-453 ↗ | NPA 346 to Overlay NPAs 281/713/832 (Texas) |