SOUTHWESTERN BELL
283 prefixes in 281 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 281-209 | WESTFIELD | 9533 | — | Yes |
| 281-212 | APOLLO | 9533 | — | Yes |
| 281-213 | CYPRESS | 9533 | — | Yes |
| 281-218 | APOLLO | 9533 | — | Yes |
| 281-219 | HSTNSUBURB | 9533 | — | Yes |
| 281-226 | APOLLO | 9533 | — | Yes |
| 281-227 | HSTNSUBURB | 9533 | — | — |
| 281-228 | HOUSTON | 9533 | — | — |
| 281-230 | WESTFIELD | 9533 | — | — |
| 281-231 | WESTFIELD | 9533 | 2004-01-20 | Yes |
| 281-232 | RICHMNRNBG | 9533 | — | — |
| 281-233 | WESTFIELD | 9533 | — | — |
| 281-238 | RICHMNRNBG | 9533 | — | Yes |
| 281-239 | RICHMNRNBG | 9533 | — | — |
| 281-244 | APOLLO | 9533 | — | — |
| 281-251 | TOMBALL | 9533 | — | — |
| 281-252 | PINEHURST | 9533 | — | Yes |
| 281-255 | TOMBALL | 9533 | — | — |
| 281-256 | CYPRESS | 9533 | — | Yes |
| 281-257 | TOMBALL | 9533 | — | — |
| 281-258 | HSTNSUBURB | 9533 | 2002-07-09 | Yes |
| 281-259 | PINEHURST | 9533 | — | — |
| 281-260 | HSTNSUBURB | 9533 | — | — |
| 281-272 | HSTNSUBURB | 9533 | — | Yes |
| 281-280 | APOLLO | 9533 | — | — |
| 281-282 | APOLLO | 9533 | — | Yes |
| 281-283 | APOLLO | 9533 | — | — |
| 281-284 | APOLLO | 9533 | — | — |
| 281-286 | APOLLO | 9533 | — | — |
| 281-288 | SPRING | 9533 | — | — |
| 281-290 | TOMBALL | 9533 | — | Yes |
| 281-291 | SEABROOK | 9533 | — | — |
| 281-292 | SPRING | 9533 | — | — |
| 281-293 | HSTNSUBURB | 9533 | — | — |
| 281-296 | SPRING | 9533 | — | Yes |
| 281-297 | SPRING | 9533 | — | Yes |
| 281-298 | SPRING | 9533 | — | — |
| 281-304 | CYPRESS | 9533 | — | Yes |
| 281-315 | BAMMEL | 9533 | — | Yes |
| 281-320 | TOMBALL | 9533 | — | Yes |
| 281-323 | SPRING | 9533 | — | Yes |
| 281-331 | ALVIN | 9533 | — | — |
| 281-341 | RICHMNRNBG | 9533 | — | — |
| 281-342 | RICHMNRNBG | 9533 | — | — |
| 281-343 | SMITHERSLK | 9533 | — | Yes |
| 281-344 | RICHMNRNBG | 9533 | — | Yes |
| 281-345 | LANGHAMCRK | 9533 | — | — |
| 281-346 | VLY LODGE | 9533 | — | Yes |
| 281-350 | SPRING | 9533 | — | — |
| 281-351 | TOMBALL | 9533 | — | — |
| 281-353 | SPRING | 9533 | — | — |
| 281-355 | SPRING | 9533 | — | — |
| 281-356 | PINEHURST | 9533 | — | Yes |
| 281-357 | TOMBALL | 9533 | — | Yes |
| 281-362 | SPRING | 9533 | — | Yes |
| 281-363 | SPRING | 9533 | — | — |
| 281-364 | SPRING | 9533 | — | — |
| 281-367 | SPRING | 9533 | — | — |
| 281-368 | HSTNSUBURB | 9533 | — | — |
| 281-370 | TOMBALL | 9533 | — | — |
| 281-372 | HSTNSUBURB | 9533 | — | Yes |
| 281-373 | CYPRESS | 9533 | — | — |
| 281-374 | TOMBALL | 9533 | — | Yes |
| 281-376 | TOMBALL | 9533 | — | — |
| 281-378 | TOMBALL | 9533 | — | Yes |
| 281-379 | TOMBALL | 9533 | — | — |
| 281-388 | ALVIN | 9533 | — | — |
| 281-390 | HOUSTON | 9533 | — | — |
| 281-393 | LIVERPOOL | 9533 | — | Yes |
| 281-397 | BAMMEL | 9533 | — | Yes |
| 281-398 | BARKER | 9533 | — | — |
| 281-399 | SPLENDORA | 9533 | — | Yes |
| 281-401 | TOMBALL | 9533 | — | Yes |
| 281-405 | HSTNSUBURB | 9533 | — | — |
| 281-408 | BAMMEL | 9533 | — | Yes |
| 281-412 | HSTNSUBURB | 9533 | — | — |
| 281-416 | HSTNSUBURB | 9533 | — | Yes |
| 281-419 | SPRING | 9533 | — | — |
| 281-423 | BAMMEL | 9533 | — | — |
| 281-432 | CLEVELAND | 9533 | — | Yes |
| 281-436 | HSTNSUBURB | 9533 | — | Yes |
| 281-437 | HSTNSUBURB | 9533 | — | — |
| 281-438 | HSTNSUBURB | 9533 | — | — |
| 281-440 | BAMMEL | 9533 | — | — |
| 281-442 | HSTNSUBURB | 9533 | — | — |
| 281-443 | WESTFIELD | 9533 | — | — |
| 281-444 | BAMMEL | 9533 | — | — |
| 281-445 | HSTNSUBURB | 9533 | — | — |
| 281-447 | HSTNSUBURB | 9533 | — | Yes |
| 281-448 | HSTNSUBURB | 9533 | — | — |
| 281-449 | HSTNSUBURB | 9533 | — | — |
| 281-452 | CHANNELVW | 9533 | — | — |
| 281-454 | HSTNSUBURB | 9533 | — | Yes |
| 281-456 | SHELDON | 9533 | — | Yes |
| 281-457 | CHANNELVW | 9533 | — | — |
| 281-458 | HSTNSUBURB | 9533 | — | — |
| 281-459 | HSTNSUBURB | 9533 | — | Yes |
| 281-461 | APOLLO | 9533 | — | Yes |
| 281-463 | LANGHAMCRK | 9533 | — | — |
| 281-464 | HSTNSUBURB | 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.