SOUTHWESTERN BELL
274 prefixes in 512 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 512-380 | AUSTIN | 9533 | — | Yes |
| 512-383 | AUSTIN | 9533 | — | Yes |
| 512-385 | AUSTIN | 9533 | — | — |
| 512-386 | AUSTIN | 9533 | — | Yes |
| 512-388 | AUSTIN | 9533 | — | — |
| 512-389 | AUSTIN | 9533 | — | — |
| 512-390 | AUSTIN | 9533 | — | — |
| 512-391 | AUSTIN | 9533 | — | Yes |
| 512-394 | AUSTIN | 9533 | — | Yes |
| 512-397 | AUSTIN | 9533 | — | — |
| 512-398 | LOCKHART | 9533 | — | — |
| 512-401 | AUSTIN | 9533 | — | Yes |
| 512-402 | AUSTIN | 9533 | — | Yes |
| 512-403 | AUSTIN | 9533 | — | — |
| 512-404 | AUSTIN | 9533 | — | — |
| 512-406 | AUSTIN | 9533 | — | Yes |
| 512-407 | AUSTIN | 9533 | — | — |
| 512-414 | AUSTIN | 9533 | — | — |
| 512-416 | AUSTIN | 9533 | — | Yes |
| 512-418 | AUSTIN | 9533 | — | Yes |
| 512-419 | AUSTIN | 9533 | — | Yes |
| 512-420 | AUSTIN | 9533 | — | Yes |
| 512-421 | AUSTIN | 9533 | — | — |
| 512-424 | AUSTIN | 9533 | — | Yes |
| 512-425 | AUSTIN | 9533 | — | Yes |
| 512-427 | AUSTIN | 9533 | — | — |
| 512-428 | AUSTIN | 9533 | — | Yes |
| 512-430 | ROCKDALE | 9533 | — | Yes |
| 512-432 | AUSTIN | 9533 | — | Yes |
| 512-433 | AUSTIN | 9533 | — | Yes |
| 512-434 | AUSTIN | 9533 | — | Yes |
| 512-435 | AUSTIN | 9533 | — | Yes |
| 512-436 | AUSTIN | 9533 | — | Yes |
| 512-437 | AUSTIN | 9533 | — | Yes |
| 512-438 | AUSTIN | 9533 | — | Yes |
| 512-440 | AUSTIN | 9533 | — | — |
| 512-441 | AUSTIN | 9533 | — | — |
| 512-442 | AUSTIN | 9533 | — | — |
| 512-443 | AUSTIN | 9533 | — | — |
| 512-444 | AUSTIN | 9533 | — | — |
| 512-445 | AUSTIN | 9533 | — | — |
| 512-446 | ROCKDALE | 9533 | — | Yes |
| 512-447 | AUSTIN | 9533 | — | — |
| 512-448 | AUSTIN | 9533 | — | — |
| 512-450 | AUSTIN | 9533 | — | Yes |
| 512-451 | AUSTIN | 9533 | — | — |
| 512-452 | AUSTIN | 9533 | — | — |
| 512-453 | AUSTIN | 9533 | — | — |
| 512-454 | AUSTIN | 9533 | — | — |
| 512-457 | AUSTIN | 9533 | — | Yes |
| 512-458 | AUSTIN | 9533 | — | Yes |
| 512-459 | AUSTIN | 9533 | — | — |
| 512-460 | AUSTIN | 9533 | — | Yes |
| 512-462 | AUSTIN | 9533 | — | — |
| 512-463 | AUSTIN | 9533 | — | — |
| 512-464 | AUSTIN | 9533 | — | Yes |
| 512-465 | AUSTIN | 9533 | — | Yes |
| 512-467 | AUSTIN | 9533 | — | Yes |
| 512-469 | AUSTIN | 9533 | — | — |
| 512-471 | AUSTIN | 9533 | — | — |
| 512-472 | AUSTIN | 9533 | — | — |
| 512-473 | AUSTIN | 9533 | — | Yes |
| 512-474 | AUSTIN | 9533 | — | — |
| 512-475 | AUSTIN | 9533 | — | Yes |
| 512-476 | AUSTIN | 9533 | — | — |
| 512-477 | AUSTIN | 9533 | — | — |
| 512-478 | AUSTIN | 9533 | — | — |
| 512-479 | AUSTIN | 9533 | — | — |
| 512-480 | AUSTIN | 9533 | — | — |
| 512-481 | AUSTIN | 9533 | — | Yes |
| 512-482 | AUSTIN | 9533 | — | — |
| 512-483 | AUSTIN | 9533 | — | Yes |
| 512-486 | AUSTIN | 9533 | — | Yes |
| 512-487 | AUSTIN | 9533 | — | Yes |
| 512-490 | AUSTIN | 9533 | — | — |
| 512-491 | AUSTIN | 9533 | — | — |
| 512-492 | AUSTIN | 9533 | — | Yes |
| 512-494 | AUSTIN | 9533 | — | Yes |
| 512-495 | AUSTIN | 9533 | — | — |
| 512-499 | AUSTIN | 9533 | — | Yes |
| 512-502 | AUSTIN | 9533 | — | Yes |
| 512-505 | AUSTIN | 9533 | — | Yes |
| 512-506 | AUSTIN | 9533 | — | Yes |
| 512-510 | XXXXXXXXXX | 9533 | — | — |
| 512-514 | AUSTIN | 9533 | — | Yes |
| 512-515 | LIBERTY HL | 9533 | — | Yes |
| 512-527 | AUSTIN | 9533 | — | Yes |
| 512-528 | LEANDER | 9533 | — | Yes |
| 512-536 | AUSTIN | 9533 | — | Yes |
| 512-542 | AUSTIN | 9533 | — | Yes |
| 512-549 | BASTROP | 9533 | 2009-06-16 | Yes |
| 512-556 | LAMPASAS | 9533 | — | — |
| 512-564 | LAMPASAS | 9533 | 2002-10-31 | Yes |
| 512-578 | AUSTIN | 9533 | 2010-08-04 | Yes |
| 512-581 | BASTROP | 9533 | — | Yes |
| 512-594 | AUSTIN | 9533 | 2001-08-10 | — |
| 512-608 | AUSTIN | 9533 | — | Yes |
| 512-609 | AUSTIN | 9533 | — | Yes |
| 512-620 | LOCKHART | 9533 | — | Yes |
| 512-623 | AUSTIN | 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.