903
Area code
TX
United States geographic area code, in service since 1990-11-04. Part of the 430/903 overlay complex — ten-digit dialing required.
Statusin service
Introduced1990-11-04
JurisdictionTX, US
Local dialing10D
Time zoneCentral
Last verified2026-09-17
Utilization 101% of assignable prefixes assigned
As of 09/17/2026
0%800 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 2001-01-05, most recent 2026-06-29.
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 | SOUTHWESTERN BELL | 130 | 16.3% |
| 02 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 96 | 12% |
| 03 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 89 | 11.1% |
| 04 | NEW CINGULAR WIRELESS PCS, LLC - IL | 70 | 8.8% |
| 05 | LEVEL 3 COMMUNICATIONS, LLC - TX | 64 | 8% |
| 06 | BRIGHTSPEED OF EASTERN TEXAS, INC. | 42 | 5.3% |
| 07 | T-MOBILE USA, INC. | 35 | 4.4% |
| 08 | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 34 | 4.3% |
| 09 | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 26 | 3.3% |
| 10 | ONVOY, LLC - TX | 22 | 2.8% |
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- 2002-02-06 NPA 430 to Overlay NPA 903 (Texas)
- 1990-11-04Area code 903 entered service (created from 214).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2002-02-06 | PL-313 ↗ | NPA 430 to Overlay NPA 903 (Texas) |
| 1989-05-26 | IL-89-05-038 ↗ | NANP - RELIEF OF THE 214 NUMBERING PLAN AREA |