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45 prefixes in 346 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 346-251 | BARKER | 004F | 2015-08-03 | Yes |
| 346-266 | HOUSTON | 004F | 2017-07-19 | Yes |
| 346-271 | FRIENDSWD | 004F | 2017-09-07 | Yes |
| 346-297 | HSTNSUBURB | 004F | 2018-03-09 | Yes |
| 346-298 | SPRING | 004F | 2018-03-09 | Yes |
| 346-301 | SPLENDORA | 004F | 2015-01-21 | Yes |
| 346-314 | SATSUMA | 004F | 2015-08-10 | Yes |
| 346-318 | ALVIN | 004F | 2018-03-12 | Yes |
| 346-327 | HOUSTON | 004F | 2018-03-22 | Yes |
| 346-338 | VLY LODGE | 004F | 2018-05-07 | Yes |
| 346-348 | HOUSTON | 004F | 2018-07-02 | Yes |
| 346-386 | SPRING | 004F | 2019-04-17 | Yes |
| 346-388 | HOUSTON | 004F | 2019-07-23 | Yes |
| 346-415 | HSTNSUBURB | 004F | 2019-12-23 | Yes |
| 346-476 | ARCOLA | 004F | 2021-06-15 | Yes |
| 346-478 | SPRING | 004F | 2021-06-30 | Yes |
| 346-501 | BARKER | 004F | 2021-09-03 | Yes |
| 346-512 | CHANNELVW | 004F | 2021-09-28 | Yes |
| 346-517 | BARKER | 004F | 2021-10-26 | Yes |
| 346-518 | PINEHURST | 004F | 2021-10-28 | Yes |
| 346-519 | CHANNELVW | 004F | 2021-10-29 | Yes |
| 346-535 | HSTNSUBURB | 004F | 2021-12-20 | Yes |
| 346-568 | LANGHAMCRK | 004F | 2022-07-01 | Yes |
| 346-569 | SATSUMA | 004F | 2022-07-01 | Yes |
| 346-572 | TOMBALL | 004F | 2022-07-01 | Yes |
| 346-575 | HSTNSUBURB | 004F | 2022-07-20 | Yes |
| 346-580 | CYPRESS | 004F | 2022-08-17 | Yes |
| 346-584 | FRIENDSWD | 004F | 2022-08-25 | Yes |
| 346-585 | STAFFORD | 004F | 2022-08-25 | Yes |
| 346-587 | CYPRESS | 004F | 2022-09-07 | Yes |
| 346-589 | SPRING | 004F | 2022-09-16 | Yes |
| 346-595 | ARCOLA | 004F | 2022-10-04 | Yes |
| 346-601 | HOUSTON | 004F | 2022-10-20 | Yes |
| 346-613 | HOUSTON | 004F | 2022-12-20 | Yes |
| 346-614 | HSTNSUBURB | 004F | 2022-12-21 | Yes |
| 346-704 | HOUSTON | 004F | 2015-04-15 | Yes |
| 346-708 | LANGHAMCRK | 004F | 2015-04-15 | Yes |
| 346-757 | STAFFORD | 004F | 2016-06-27 | Yes |
| 346-781 | HOUSTON | 004F | 2024-02-16 | Yes |
| 346-808 | TOMBALL | 004F | 2015-06-08 | Yes |
| 346-839 | APOLLO | 004F | 2024-09-26 | Yes |
| 346-854 | KEMAH | 004F | 2024-12-09 | Yes |
| 346-881 | MONTBLVIEU | 004F | 2025-07-30 | Yes |
| 346-917 | CHANNELVW | 004F | 2016-06-24 | Yes |
| 346-980 | HOUSTON | 004F | — | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.