All assignees
766 prefixes in 346 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 346-400 | HSTNSUBURB | 903C | 2015-03-26 | Yes |
| 346-401 | HOUSTON | 6701 | 2015-05-27 | Yes |
| 346-402 | CLEVELAND | 6701 | 2015-10-23 | Yes |
| 346-403 | HOUSTON | 177F | — | Yes |
| 346-404 | HOUSTON | 763H | 2016-02-19 | Yes |
| 346-405 | HOUSTON | 7138 | — | Yes |
| 346-406 | HOUSTON | 073H | 2016-12-02 | Yes |
| 346-407 | HOUSTON | 6506 | 2019-10-28 | Yes |
| 346-408 | DICKINSON | 6701 | 2019-12-23 | Yes |
| 346-409 | HSTNSUBURB | 318J | 2019-12-24 | Yes |
| 346-410 | HSTNSUBURB | 6534 | 2016-05-20 | Yes |
| 346-411 | XXXXXXXXXX | MULT | — | — |
| 346-412 | CYPRESS | 792K | 2016-06-10 | Yes |
| 346-413 | SPRING | 6534 | 2016-12-20 | Yes |
| 346-414 | CLEVELAND | 6701 | 2016-11-02 | Yes |
| 346-415 | HSTNSUBURB | 004F | 2019-12-23 | Yes |
| 346-416 | TOMBALL | 7138 | 2020-01-08 | Yes |
| 346-417 | CHANNELVW | 6534 | 2020-01-09 | Yes |
| 346-418 | BAMMEL | 6534 | 2020-01-15 | Yes |
| 346-419 | BAMMEL | 6701 | 2020-01-28 | Yes |
| 346-420 | SUGAR LAND | 5562 | 2017-03-28 | Yes |
| 346-421 | ARCOLA | 6534 | 2020-02-11 | Yes |
| 346-422 | HSTNSUBURB | 6534 | 2020-02-11 | Yes |
| 346-423 | PORTER | 318J | 2020-02-26 | Yes |
| 346-424 | SATSUMA | 6534 | 2020-03-26 | Yes |
| 346-425 | LANGHAMCRK | 6506 | 2020-03-26 | Yes |
| 346-426 | HOUSTON | 321J | 2019-10-31 | Yes |
| 346-427 | APOLLO | 6534 | 2020-04-07 | Yes |
| 346-428 | HOUSTON | 478J | 2020-07-28 | Yes |
| 346-429 | BAMMEL | 6701 | 2020-08-28 | Yes |
| 346-430 | HOUSTON | 6701 | 2022-09-02 | Yes |
| 346-431 | BAYTOWN | 6701 | 2020-08-28 | Yes |
| 346-432 | HSTNSUBURB | 965H | 2020-07-09 | Yes |
| 346-433 | HSTNSUBURB | 965H | 2020-08-19 | Yes |
| 346-434 | HSTNSUBURB | 6701 | 2020-08-28 | Yes |
| 346-435 | LANGHAMCRK | 6506 | 2020-09-03 | Yes |
| 346-436 | LANGHAMCRK | 6506 | — | Yes |
| 346-437 | HSTNSUBURB | 7138 | 2020-09-11 | Yes |
| 346-438 | HOUSTON | 515J | 2020-09-28 | Yes |
| 346-439 | HSTNSUBURB | 318J | 2020-10-05 | Yes |
| 346-440 | HSTNSUBURB | 318J | 2020-10-05 | Yes |
| 346-441 | HOUSTON | 318J | 2020-10-05 | Yes |
| 346-442 | SPRING | 318J | 2020-10-07 | Yes |
| 346-443 | SPRING | 318J | 2020-10-07 | Yes |
| 346-444 | HOUSTON | 319D | 2014-01-16 | Yes |
| 346-445 | CYPRESS | 6506 | 2020-10-14 | Yes |
| 346-446 | HOUSTON | 706G | 2018-08-15 | Yes |
| 346-447 | CLEVELAND | 6506 | 2020-10-15 | Yes |
| 346-448 | HOUSTON | 6701 | 2020-10-26 | Yes |
| 346-449 | CHANNELVW | 5562 | 2020-10-28 | Yes |
| 346-450 | SUGAR LAND | 5562 | 2020-10-28 | Yes |
| 346-451 | HOUSTON | 7138 | 2020-11-17 | Yes |
| 346-452 | CYPRESS | 6534 | 2020-12-28 | Yes |
| 346-453 | HOUSTON | 6506 | 2021-01-11 | Yes |
| 346-454 | BAMMEL | 6701 | 2021-01-11 | Yes |
| 346-455 | HOUSTON | 965H | 2020-11-17 | Yes |
| 346-456 | MANVEL | 903C | 2019-06-18 | Yes |
| 346-457 | KATY | 495J | 2021-03-09 | Yes |
| 346-458 | BEACH CITY | 495J | 2021-03-18 | Yes |
| 346-459 | SPRING | 6506 | 2021-04-12 | Yes |
| 346-460 | BAMMEL | 6534 | 2021-04-19 | Yes |
| 346-461 | HSTNSUBURB | 6534 | 2021-04-19 | Yes |
| 346-462 | CYPRESS | 6701 | 2021-04-29 | Yes |
| 346-463 | ALVIN | 903C | 2020-10-29 | Yes |
| 346-464 | RICHMNRNBG | 6701 | 2021-04-29 | Yes |
| 346-465 | LANGHAMCRK | 965H | 2019-05-21 | Yes |
| 346-466 | HIGHLANDS | 903C | 2020-10-28 | Yes |
| 346-467 | RICHMNRNBG | 6506 | 2021-05-05 | Yes |
| 346-468 | TOMBALL | 197D | 2021-05-06 | Yes |
| 346-469 | HOUSTON | 6701 | 2022-09-02 | Yes |
| 346-470 | HUMBLE | 197D | 2021-05-06 | Yes |
| 346-471 | HSTNSUBURB | 622J | 2021-05-19 | Yes |
| 346-472 | BAYTOWN | 073H | 2021-06-09 | Yes |
| 346-473 | HOUSTON | 6701 | 2021-06-10 | Yes |
| 346-474 | FRIENDSWD | 903C | 2021-02-01 | Yes |
| 346-475 | HOUSTON | 6701 | 2021-06-10 | Yes |
| 346-476 | ARCOLA | 004F | 2021-06-15 | Yes |
| 346-477 | HUMBLE | 965H | 2020-07-09 | Yes |
| 346-478 | SPRING | 004F | 2021-06-30 | Yes |
| 346-479 | LANGHAMCRK | 6506 | 2021-08-10 | Yes |
| 346-480 | CROSBY | 903C | 2021-07-26 | Yes |
| 346-481 | RICHMNRNBG | 7138 | 2021-03-19 | Yes |
| 346-482 | LANGHAMCRK | 903C | 2021-06-24 | Yes |
| 346-483 | APOLLO | 903C | 2021-07-20 | Yes |
| 346-484 | SHELDON | 903C | 2021-07-20 | Yes |
| 346-485 | HUFFMAN | 903C | 2021-07-20 | Yes |
| 346-486 | LIVERPOOL | 903C | 2021-07-26 | Yes |
| 346-487 | SEABROOK | 903C | 2021-07-26 | Yes |
| 346-488 | PORTER HTS | 965H | 2020-07-09 | Yes |
| 346-489 | LA PORTE | 903C | 2021-07-26 | Yes |
| 346-490 | HSTNSUBURB | 6701 | 2021-08-11 | Yes |
| 346-491 | BAMMEL | 6701 | 2021-08-11 | Yes |
| 346-492 | HOUSTON | 6701 | 2021-08-12 | Yes |
| 346-493 | BAMMEL | 6701 | 2017-03-16 | Yes |
| 346-494 | HOUSTON | 6701 | 2021-08-12 | Yes |
| 346-495 | SPRING | 6701 | 2021-08-13 | Yes |
| 346-496 | BEACH CITY | 903C | 2020-11-04 | Yes |
| 346-497 | SPRING | 6534 | 2021-08-17 | Yes |
| 346-498 | HSTNSUBURB | 6534 | 2021-08-31 | Yes |
| 346-499 | DEER PARK | 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.