409
Area code
TX
United States geographic area code, in service since 1982-11-01.
Statusin service
Introduced1982-11-01
JurisdictionTX, US
Local dialing10D
Time zoneCentral
Last verified2026-09-17
Utilization 56.8% of assignable prefixes assigned
As of 09/17/2026
0%450 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 2026-08-05.
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 | 142 | 31.6% |
| 02 | NEW CINGULAR WIRELESS PCS, LLC - IL | 50 | 11.1% |
| 03 | ONVOY, LLC - TX | 37 | 8.2% |
| 04 | AERIAL COMMUNICATIONS, INC. | 28 | 6.2% |
| 05 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 26 | 5.8% |
| 06 | LEVEL 3 COMMUNICATIONS, LLC - TX | 22 | 4.9% |
| 07 | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 15 | 3.3% |
| 08 | TWC IP ENABLED SERVICES, LLC | 13 | 2.9% |
| 09 | FRACTEL, LLC | 13 | 2.9% |
| 10 | METROPCS, INC. | 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- 1982-11-01Area code 409 entered service (created from 713).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2021-01-08 | PL-556 ↗ | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Lifeline) – supersedes PL-544 |
| 2020-08-17 | PL-544 ↗ | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline |