SOUTHWESTERN BELL
274 prefixes in 512 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 512-206 | AUSTIN | 9533 | — | Yes |
| 512-207 | AUSTIN | 9533 | — | Yes |
| 512-218 | AUSTIN | 9533 | — | — |
| 512-219 | AUSTIN | 9533 | — | — |
| 512-223 | AUSTIN | 9533 | — | — |
| 512-224 | AUSTIN | 9533 | — | — |
| 512-226 | AUSTIN | 9533 | — | Yes |
| 512-227 | LOCKHART | 9533 | 2001-05-09 | Yes |
| 512-228 | AUSTIN | 9533 | — | Yes |
| 512-231 | AUSTIN | 9533 | — | — |
| 512-232 | AUSTIN | 9533 | — | — |
| 512-236 | AUSTIN | 9533 | — | Yes |
| 512-237 | SMITHVILLE | 9533 | — | Yes |
| 512-238 | AUSTIN | 9533 | — | — |
| 512-239 | AUSTIN | 9533 | — | Yes |
| 512-241 | AUSTIN | 9533 | — | Yes |
| 512-242 | AUSTIN | 9533 | — | — |
| 512-243 | AUSTIN | 9533 | — | Yes |
| 512-244 | AUSTIN | 9533 | — | — |
| 512-246 | AUSTIN | 9533 | — | — |
| 512-247 | AUSTIN | 9533 | — | Yes |
| 512-248 | AUSTIN | 9533 | — | — |
| 512-249 | AUSTIN | 9533 | — | — |
| 512-250 | AUSTIN | 9533 | — | — |
| 512-251 | AUSTIN | 9533 | — | — |
| 512-252 | AUSTIN | 9533 | — | — |
| 512-255 | AUSTIN | 9533 | — | — |
| 512-257 | AUSTIN | 9533 | — | — |
| 512-258 | AUSTIN | 9533 | — | — |
| 512-259 | LEANDER | 9533 | — | — |
| 512-260 | LEANDER | 9533 | — | — |
| 512-261 | AUSTIN | 9533 | — | — |
| 512-263 | AUSTIN | 9533 | — | — |
| 512-264 | AUSTIN | 9533 | — | Yes |
| 512-266 | AUSTIN | 9533 | — | — |
| 512-267 | AUSTIN | 9533 | — | — |
| 512-272 | AUSTIN | 9533 | — | — |
| 512-276 | AUSTIN | 9533 | — | Yes |
| 512-278 | AUSTIN | 9533 | — | — |
| 512-280 | AUSTIN | 9533 | — | — |
| 512-281 | ELGIN | 9533 | — | Yes |
| 512-282 | AUSTIN | 9533 | — | — |
| 512-283 | AUSTIN | 9533 | — | — |
| 512-285 | ELGIN | 9533 | — | Yes |
| 512-286 | AUSTIN | 9533 | 2001-05-22 | — |
| 512-288 | AUSTIN | 9533 | — | — |
| 512-291 | AUSTIN | 9533 | — | Yes |
| 512-292 | AUSTIN | 9533 | — | — |
| 512-301 | AUSTIN | 9533 | — | Yes |
| 512-302 | AUSTIN | 9533 | — | — |
| 512-303 | BASTROP | 9533 | — | — |
| 512-304 | BASTROP | 9533 | — | — |
| 512-306 | AUSTIN | 9533 | — | — |
| 512-308 | BASTROP | 9533 | — | Yes |
| 512-310 | AUSTIN | 9533 | — | — |
| 512-314 | AUSTIN | 9533 | — | Yes |
| 512-315 | AUSTIN | 9533 | — | — |
| 512-320 | AUSTIN | 9533 | — | — |
| 512-321 | BASTROP | 9533 | — | — |
| 512-322 | AUSTIN | 9533 | — | — |
| 512-323 | AUSTIN | 9533 | — | — |
| 512-324 | AUSTIN | 9533 | — | — |
| 512-326 | AUSTIN | 9533 | — | — |
| 512-327 | AUSTIN | 9533 | — | — |
| 512-328 | AUSTIN | 9533 | — | — |
| 512-329 | AUSTIN | 9533 | — | — |
| 512-330 | AUSTIN | 9533 | — | Yes |
| 512-331 | AUSTIN | 9533 | — | — |
| 512-332 | BASTROP | 9533 | — | Yes |
| 512-335 | AUSTIN | 9533 | — | — |
| 512-336 | AUSTIN | 9533 | — | Yes |
| 512-338 | AUSTIN | 9533 | — | — |
| 512-339 | AUSTIN | 9533 | — | — |
| 512-340 | AUSTIN | 9533 | — | — |
| 512-341 | AUSTIN | 9533 | — | — |
| 512-342 | AUSTIN | 9533 | — | — |
| 512-343 | AUSTIN | 9533 | — | — |
| 512-344 | AUSTIN | 9533 | — | Yes |
| 512-345 | AUSTIN | 9533 | — | — |
| 512-346 | AUSTIN | 9533 | — | — |
| 512-347 | AUSTIN | 9533 | — | — |
| 512-349 | AUSTIN | 9533 | — | — |
| 512-352 | TAYLOR | 9533 | — | Yes |
| 512-356 | AUSTIN | 9533 | — | Yes |
| 512-358 | AUSTIN | 9533 | — | Yes |
| 512-360 | SMITHVILLE | 9533 | — | Yes |
| 512-363 | AUSTIN | 9533 | — | Yes |
| 512-365 | TAYLOR | 9533 | — | Yes |
| 512-366 | AUSTIN | 9533 | — | Yes |
| 512-367 | AUSTIN | 9533 | — | Yes |
| 512-369 | AUSTIN | 9533 | — | Yes |
| 512-370 | AUSTIN | 9533 | — | — |
| 512-371 | AUSTIN | 9533 | — | Yes |
| 512-372 | AUSTIN | 9533 | — | — |
| 512-373 | AUSTIN | 9533 | — | Yes |
| 512-374 | AUSTIN | 9533 | — | — |
| 512-376 | LOCKHART | 9533 | — | Yes |
| 512-377 | AUSTIN | 9533 | — | Yes |
| 512-378 | AUSTIN | 9533 | — | Yes |
| 512-379 | LEANDER | 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.