SOUTHWESTERN BELL
307 prefixes in 972 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 972-406 | DALLAS | 9533 | — | — |
| 972-407 | DALLAS | 9533 | — | — |
| 972-409 | DALLAS | 9533 | — | — |
| 972-419 | DALLAS | 9533 | — | — |
| 972-427 | CRANDALL | 9533 | — | Yes |
| 972-432 | DALLAS | 9533 | — | Yes |
| 972-433 | PROSPER | 9533 | 2017-05-22 | Yes |
| 972-437 | DALLAS | 9533 | — | Yes |
| 972-443 | DALLAS | 9533 | — | — |
| 972-444 | DALLAS | 9533 | — | — |
| 972-447 | DALLAS | 9533 | — | Yes |
| 972-448 | DALLAS | 9533 | — | — |
| 972-450 | DALLAS | 9533 | — | — |
| 972-454 | DALLAS | 9533 | — | Yes |
| 972-455 | DALLAS | 9533 | — | Yes |
| 972-458 | DALLAS | 9533 | — | Yes |
| 972-470 | DALLAS | 9533 | — | Yes |
| 972-472 | CRANDALL | 9533 | — | Yes |
| 972-474 | COMBINE | 9533 | — | Yes |
| 972-476 | COMBINE | 9533 | — | Yes |
| 972-479 | DALLAS | 9533 | — | Yes |
| 972-480 | DALLAS | 9533 | — | Yes |
| 972-481 | DALLAS | 9533 | — | Yes |
| 972-483 | ITALY | 9533 | — | Yes |
| 972-484 | DALLAS | 9533 | — | — |
| 972-488 | DALLAS | 9533 | — | Yes |
| 972-490 | DALLAS | 9533 | — | — |
| 972-497 | DALLAS | 9533 | — | Yes |
| 972-498 | DALLAS | 9533 | — | Yes |
| 972-501 | DALLAS | 9533 | — | — |
| 972-503 | DALLAS | 9533 | — | Yes |
| 972-504 | GRANDPRARI | 9533 | — | Yes |
| 972-506 | DALLAS | 9533 | — | — |
| 972-515 | RED OAK | 9533 | — | Yes |
| 972-522 | GRANDPRARI | 9533 | — | Yes |
| 972-524 | TERRELL | 9533 | — | — |
| 972-528 | DALLAS | 9533 | — | Yes |
| 972-529 | MCKINNEY | 9533 | — | Yes |
| 972-540 | MCKINNEY | 9533 | — | — |
| 972-542 | MCKINNEY | 9533 | — | — |
| 972-547 | MCKINNEY | 9533 | — | — |
| 972-548 | MCKINNEY | 9533 | — | — |
| 972-551 | TERRELL | 9533 | — | Yes |
| 972-552 | FORNEY | 9533 | — | Yes |
| 972-556 | DALLAS | 9533 | — | Yes |
| 972-557 | DALLAS | 9533 | — | — |
| 972-558 | GRANDPRARI | 9533 | — | — |
| 972-559 | DALLAS | 9533 | — | Yes |
| 972-561 | GRANDPRARI | 9533 | — | Yes |
| 972-562 | MCKINNEY | 9533 | — | — |
| 972-563 | TERRELL | 9533 | — | — |
| 972-564 | FORNEY | 9533 | — | Yes |
| 972-566 | DALLAS | 9533 | — | — |
| 972-569 | MCKINNEY | 9533 | — | Yes |
| 972-572 | DALLAS | 9533 | — | Yes |
| 972-576 | RED OAK | 9533 | — | Yes |
| 972-584 | DALLAS | 9533 | — | Yes |
| 972-588 | DALLAS | 9533 | — | Yes |
| 972-591 | DALLAS | 9533 | — | Yes |
| 972-595 | GRANDPRARI | 9533 | — | Yes |
| 972-601 | GRANDPRARI | 9533 | — | — |
| 972-602 | GRANDPRARI | 9533 | — | Yes |
| 972-603 | GRANDPRARI | 9533 | — | Yes |
| 972-606 | GRANDPRARI | 9533 | — | — |
| 972-610 | XXXXXXXXXX | 9533 | — | — |
| 972-613 | DALLAS | 9533 | — | Yes |
| 972-614 | GRANDPRARI | 9533 | — | Yes |
| 972-617 | RED OAK | 9533 | — | — |
| 972-620 | DALLAS | 9533 | — | — |
| 972-623 | GRANDPRARI | 9533 | — | Yes |
| 972-624 | FRISCO | 9533 | — | Yes |
| 972-625 | FRISCO | 9533 | — | — |
| 972-628 | DALLAS | 9533 | — | Yes |
| 972-630 | DALLAS | 9533 | — | Yes |
| 972-635 | ROYSE CITY | 9533 | — | Yes |
| 972-636 | ROYSE CITY | 9533 | — | Yes |
| 972-638 | DALLAS | 9533 | 2001-04-24 | Yes |
| 972-641 | GRANDPRARI | 9533 | — | — |
| 972-642 | GRANDPRARI | 9533 | — | — |
| 972-643 | DALLAS | 9533 | — | Yes |
| 972-644 | DALLAS | 9533 | — | — |
| 972-647 | GRANDPRARI | 9533 | — | — |
| 972-660 | GRANDPRARI | 9533 | — | — |
| 972-661 | DALLAS | 9533 | — | — |
| 972-663 | DALLAS | 9533 | — | Yes |
| 972-664 | DALLAS | 9533 | — | Yes |
| 972-669 | DALLAS | 9533 | — | — |
| 972-671 | DALLAS | 9533 | — | Yes |
| 972-680 | DALLAS | 9533 | — | — |
| 972-681 | DALLAS | 9533 | — | — |
| 972-682 | DALLAS | 9533 | — | Yes |
| 972-683 | MCKINNEY | 9533 | — | — |
| 972-684 | DALLAS | 9533 | — | Yes |
| 972-685 | DALLAS | 9533 | — | Yes |
| 972-686 | DALLAS | 9533 | — | Yes |
| 972-687 | DALLAS | 9533 | — | — |
| 972-690 | DALLAS | 9533 | — | — |
| 972-698 | DALLAS | 9533 | — | Yes |
| 972-699 | DALLAS | 9533 | — | Yes |
| 972-701 | DALLAS | 9533 | — | 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.