All assignees
800 prefixes in 281 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 281-400 | FRIENDSWD | 903C | — | Yes |
| 281-401 | TOMBALL | 9533 | — | Yes |
| 281-402 | LA PORTE | 829J | — | Yes |
| 281-403 | STAFFORD | 4344 | — | — |
| 281-404 | HOUSTON | 7670 | — | Yes |
| 281-405 | HSTNSUBURB | 9533 | — | — |
| 281-406 | HSTNSUBURB | 7138 | — | Yes |
| 281-407 | HOUSTON | 6114 | 2011-05-13 | Yes |
| 281-408 | BAMMEL | 9533 | — | Yes |
| 281-409 | HOUSTON | 6506 | 2007-09-04 | Yes |
| 281-410 | STAFFORD | 7670 | — | Yes |
| 281-411 | XXXXXXXXXX | MULT | — | — |
| 281-412 | HSTNSUBURB | 9533 | — | — |
| 281-413 | HOUSTON | 6506 | — | — |
| 281-414 | HOUSTON | 6506 | — | — |
| 281-415 | LANGHAMCRK | 6506 | — | — |
| 281-416 | HSTNSUBURB | 9533 | — | Yes |
| 281-417 | LA PORTE | 6114 | — | Yes |
| 281-418 | HOUSTON | 6630 | — | — |
| 281-419 | SPRING | 9533 | — | — |
| 281-420 | BAYTOWN | 4344 | — | — |
| 281-421 | BAYTOWN | 4344 | — | — |
| 281-422 | BAYTOWN | 4344 | — | — |
| 281-423 | BAMMEL | 9533 | — | — |
| 281-424 | BAYTOWN | 4344 | — | — |
| 281-425 | BAYTOWN | 4344 | — | Yes |
| 281-426 | HIGHLANDS | 4344 | — | Yes |
| 281-427 | BAYTOWN | 4344 | — | — |
| 281-428 | BAYTOWN | 4344 | — | Yes |
| 281-429 | PORTER HTS | 2114 | — | Yes |
| 281-430 | SPRING | 2091 | — | — |
| 281-431 | ARCOLA | 4344 | — | Yes |
| 281-432 | CLEVELAND | 9533 | — | Yes |
| 281-433 | HOUSTON | 6534 | — | — |
| 281-434 | HOUSTON | 9748 | — | — |
| 281-435 | HOUSTON | 6534 | — | — |
| 281-436 | HSTNSUBURB | 9533 | — | Yes |
| 281-437 | HSTNSUBURB | 9533 | — | — |
| 281-438 | HSTNSUBURB | 9533 | — | — |
| 281-439 | HOUSTON | 6630 | — | — |
| 281-440 | BAMMEL | 9533 | — | — |
| 281-441 | HUMBLE | 2114 | — | Yes |
| 281-442 | HSTNSUBURB | 9533 | — | — |
| 281-443 | WESTFIELD | 9533 | — | — |
| 281-444 | BAMMEL | 9533 | — | — |
| 281-445 | HSTNSUBURB | 9533 | — | — |
| 281-446 | HUMBLE | 2114 | — | — |
| 281-447 | HSTNSUBURB | 9533 | — | Yes |
| 281-448 | HSTNSUBURB | 9533 | — | — |
| 281-449 | HSTNSUBURB | 9533 | — | — |
| 281-450 | HOUSTON | 6534 | 2001-05-08 | — |
| 281-451 | HOUSTON | 5562 | — | Yes |
| 281-452 | CHANNELVW | 9533 | — | — |
| 281-453 | BAMMEL | 903C | — | — |
| 281-454 | HSTNSUBURB | 9533 | — | Yes |
| 281-455 | HOUSTON | 6534 | 2001-05-11 | — |
| 281-456 | SHELDON | 9533 | — | Yes |
| 281-457 | CHANNELVW | 9533 | — | — |
| 281-458 | HSTNSUBURB | 9533 | — | — |
| 281-459 | HSTNSUBURB | 9533 | — | Yes |
| 281-460 | HOUSTON | 6534 | — | — |
| 281-461 | APOLLO | 9533 | — | Yes |
| 281-462 | CROSBY | 4344 | — | Yes |
| 281-463 | LANGHAMCRK | 9533 | — | — |
| 281-464 | HSTNSUBURB | 9533 | — | Yes |
| 281-465 | SPRING | 9533 | — | Yes |
| 281-466 | SPRING | 9533 | — | Yes |
| 281-467 | HOUSTON | 6534 | 2001-05-11 | — |
| 281-468 | HOUSTON | 6534 | — | — |
| 281-469 | SATSUMA | 9533 | — | — |
| 281-470 | LA PORTE | 9533 | — | — |
| 281-471 | LA PORTE | 9533 | — | — |
| 281-472 | HOUSTON | 6630 | — | — |
| 281-473 | HSTNSUBURB | 903C | 2024-11-20 | Yes |
| 281-474 | SEABROOK | 9533 | — | — |
| 281-475 | SPRING | 6506 | 2008-03-26 | Yes |
| 281-476 | DEER PARK | 9533 | — | Yes |
| 281-477 | SATSUMA | 9533 | — | — |
| 281-478 | DEER PARK | 9533 | — | Yes |
| 281-479 | DEER PARK | 9533 | — | — |
| 281-480 | APOLLO | 9533 | — | — |
| 281-481 | HSTNSUBURB | 9533 | — | — |
| 281-482 | FRIENDSWD | 9533 | — | — |
| 281-483 | APOLLO | 9533 | — | — |
| 281-484 | HSTNSUBURB | 9533 | — | — |
| 281-485 | HSTNSUBURB | 9533 | — | — |
| 281-486 | APOLLO | 9533 | — | — |
| 281-487 | HSTNSUBURB | 9533 | — | — |
| 281-488 | APOLLO | 9533 | — | — |
| 281-489 | MANVEL | 9533 | — | — |
| 281-490 | SUGAR LAND | 2147 | — | — |
| 281-491 | SUGAR LAND | 2147 | — | — |
| 281-492 | BARKER | 9533 | — | Yes |
| 281-493 | HSTNSUBURB | 9533 | — | — |
| 281-494 | SUGAR LAND | 2147 | — | — |
| 281-495 | HSTNSUBURB | 9533 | — | — |
| 281-496 | HSTNSUBURB | 9533 | — | — |
| 281-497 | HSTNSUBURB | 9533 | — | Yes |
| 281-498 | HSTNSUBURB | 9533 | — | Yes |
| 281-499 | STAFFORD | 4344 | — | — |
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.