979
Area code
Statusin service
Introduced2000-02-19
JurisdictionTX, US
Local dialing7D
Time zoneCentral
Last verified2026-09-17
Utilization 56.3% of assignable prefixes assigned
As of 09/17/2026
0%446 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 2001-02-08, most recent 2026-07-21.
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 | 59 | 13.2% |
| 02 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 54 | 12.1% |
| 03 | NEW CINGULAR WIRELESS PCS, LLC - IL | 47 | 10.5% |
| 04 | LEVEL 3 COMMUNICATIONS, LLC - TX | 30 | 6.7% |
| 05 | AERIAL COMMUNICATIONS, INC. | 29 | 6.5% |
| 06 | TEXAS COMMUNICATIONS, INC. | 24 | 5.4% |
| 07 | 24 | 5.4% | |
| 08 | ONVOY, LLC - TX | 16 | 3.6% |
| 09 | PEERLESS NETWORK OF TEXAS, LLC - TX | 12 | 2.7% |
| 10 | FRACTEL, LLC | 12 | 2.7% |
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- 2000-02-19Area code 979 entered service (created from 409).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 1999-12-06 | PL-201 ↗ | 409 NPA split, Creating 936 and 979 NPAs - Texas |