All assignees
766 prefixes in 346 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 346-500 | HOUSTON | 145J | 2019-03-19 | Yes |
| 346-501 | BARKER | 004F | 2021-09-03 | Yes |
| 346-502 | HOUSTON | 903C | 2021-08-24 | Yes |
| 346-503 | HOUSTON | 6701 | 2021-09-16 | Yes |
| 346-504 | HOUSTON | 6701 | 2021-09-16 | Yes |
| 346-505 | BAMMEL | 6701 | 2021-09-16 | Yes |
| 346-506 | HOUSTON | 624H | 2021-09-16 | Yes |
| 346-507 | LANGHAMCRK | 6534 | 2021-09-20 | Yes |
| 346-508 | SATSUMA | 939H | 2021-09-22 | Yes |
| 346-509 | HOUSTON | 903C | — | Yes |
| 346-510 | HOUSTON | 624H | 2019-10-25 | Yes |
| 346-511 | XXXXXXXXXX | MULT | — | — |
| 346-512 | CHANNELVW | 004F | 2021-09-28 | Yes |
| 346-513 | CYPRESS | 6534 | 2021-10-11 | Yes |
| 346-514 | STAFFORD | 5562 | 2021-10-12 | Yes |
| 346-515 | RICHMNRNBG | 903C | 2021-01-25 | Yes |
| 346-516 | HOUSTON | 6506 | 2021-10-19 | 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 |
| 346-520 | HOUSTON | 475J | 2021-11-01 | Yes |
| 346-521 | SUGAR LAND | 903C | 2021-11-02 | Yes |
| 346-522 | HUMBLE | 903C | 2021-10-28 | Yes |
| 346-523 | KEMAH | 903C | 2021-11-02 | Yes |
| 346-524 | HSTNSUBURB | 321J | 2021-11-04 | Yes |
| 346-525 | SPRING | 6534 | 2021-11-17 | Yes |
| 346-526 | HOUSTON | 6701 | 2021-11-18 | Yes |
| 346-527 | KATY | 903C | 2021-11-19 | Yes |
| 346-528 | MANVEL | 6534 | 2021-11-22 | Yes |
| 346-529 | HSTNSUBURB | 965H | 2019-05-21 | Yes |
| 346-530 | BAMMEL | 6701 | 2021-12-15 | Yes |
| 346-531 | BAMMEL | 6701 | 2021-12-15 | Yes |
| 346-532 | CLEVELAND | 903C | 2021-11-24 | Yes |
| 346-533 | BAYTOWN | 622J | 2021-09-07 | Yes |
| 346-534 | TOMBALL | 903C | 2021-12-14 | Yes |
| 346-535 | HSTNSUBURB | 004F | 2021-12-20 | Yes |
| 346-536 | SATSUMA | 903C | 2020-11-06 | Yes |
| 346-537 | HOUSTON | 490J | 2021-12-29 | Yes |
| 346-538 | RICHMNRNBG | 490J | 2022-01-06 | Yes |
| 346-539 | CYPRESS | 490J | 2022-01-06 | Yes |
| 346-540 | SPLENDORA | 490J | 2022-01-06 | Yes |
| 346-541 | HOUSTON | 6701 | 2022-01-14 | Yes |
| 346-542 | HOUSTON | 7229 | 2022-01-05 | Yes |
| 346-543 | BAMMEL | 6701 | 2022-01-14 | Yes |
| 346-544 | CYPRESS | 6701 | 2022-01-18 | Yes |
| 346-545 | RICHMNRNBG | 6701 | 2022-01-19 | Yes |
| 346-546 | LANGHAMCRK | 939H | 2022-01-25 | Yes |
| 346-547 | HOUSTON | 903C | 2022-01-27 | Yes |
| 346-548 | BAYTOWN | 6506 | 2022-02-07 | Yes |
| 346-549 | BAYTOWN | 6701 | 2022-01-26 | Yes |
| 346-550 | CYPRESS | 6506 | 2022-02-07 | Yes |
| 346-551 | BAMMEL | 6534 | 2022-03-11 | Yes |
| 346-552 | ALVIN | 6506 | 2022-03-16 | Yes |
| 346-553 | HOUSTON | 903C | 2022-04-05 | Yes |
| 346-554 | HOUSTON | 6506 | 2022-04-12 | Yes |
| 346-555 | DIR ASST | MULT | — | — |
| 346-556 | HOUSTON | 671J | 2022-05-24 | Yes |
| 346-557 | HSTNSUBURB | 671J | 2022-05-24 | Yes |
| 346-558 | RICHMNRNBG | 6701 | 2022-05-27 | Yes |
| 346-559 | HUMBLE | 6534 | 2022-06-21 | Yes |
| 346-560 | HOUSTON | 829J | 2022-06-22 | Yes |
| 346-561 | HOUSTON | 177F | 2016-09-09 | Yes |
| 346-562 | HOUSTON | 6701 | 2022-06-28 | Yes |
| 346-563 | HOUSTON | 6701 | 2022-06-28 | Yes |
| 346-564 | HOUSTON | 6701 | 2022-06-29 | Yes |
| 346-565 | HOUSTON | 6701 | 2022-06-29 | Yes |
| 346-566 | WESTFIELD | 965H | 2021-05-10 | Yes |
| 346-567 | MONTBLVIEU | 903C | 2019-06-18 | Yes |
| 346-568 | LANGHAMCRK | 004F | 2022-07-01 | Yes |
| 346-569 | SATSUMA | 004F | 2022-07-01 | Yes |
| 346-570 | HSTNSUBURB | 7074 | 2016-09-06 | Yes |
| 346-571 | HOUSTON | 318J | 2015-09-15 | Yes |
| 346-572 | TOMBALL | 004F | 2022-07-01 | Yes |
| 346-573 | CYPRESS | 6506 | 2022-07-13 | Yes |
| 346-574 | SPRING | 6534 | 2022-07-15 | Yes |
| 346-575 | HSTNSUBURB | 004F | 2022-07-20 | Yes |
| 346-576 | BARKER | 903C | 2020-11-04 | Yes |
| 346-577 | HOUSTON | 965H | 2020-07-09 | Yes |
| 346-578 | LANGHAMCRK | 6506 | 2022-08-09 | Yes |
| 346-579 | DICKINSON | 6701 | 2022-08-12 | Yes |
| 346-580 | CYPRESS | 004F | 2022-08-17 | Yes |
| 346-581 | SPRING | 6506 | 2022-08-19 | Yes |
| 346-582 | HSTNSUBURB | 6701 | 2022-08-24 | Yes |
| 346-583 | HSTNSUBURB | 6701 | 2022-08-24 | Yes |
| 346-584 | FRIENDSWD | 004F | 2022-08-25 | Yes |
| 346-585 | STAFFORD | 004F | 2022-08-25 | Yes |
| 346-586 | HOUSTON | 6701 | 2022-09-02 | Yes |
| 346-587 | CYPRESS | 004F | 2022-09-07 | Yes |
| 346-588 | CYPRESS | 965H | 2021-05-10 | Yes |
| 346-589 | SPRING | 004F | 2022-09-16 | Yes |
| 346-590 | WESTFIELD | 318J | 2022-09-20 | Yes |
| 346-591 | PORTER HTS | 318J | 2022-09-21 | Yes |
| 346-592 | BAMMEL | 6701 | 2022-09-28 | Yes |
| 346-593 | BAMMEL | 6701 | 2022-09-28 | Yes |
| 346-594 | BARKER | 318J | 2022-10-03 | Yes |
| 346-595 | ARCOLA | 004F | 2022-10-04 | Yes |
| 346-596 | HUMBLE | 624H | 2022-10-14 | Yes |
| 346-597 | LANGHAMCRK | 624H | 2022-10-14 | Yes |
| 346-598 | TOMBALL | 624H | 2022-10-14 | Yes |
| 346-599 | HOUSTON | 965H | 2021-05-10 | 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.