SOUTHWESTERN BELL
110 prefixes in 636 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 636-207 | MANCHESTER | 9533 | — | — |
| 636-221 | WASHINGTON | 9533 | 2002-05-14 | Yes |
| 636-225 | VALLEYPARK | 9533 | — | — |
| 636-226 | VALLEYPARK | 9533 | — | Yes |
| 636-227 | MANCHESTER | 9533 | — | — |
| 636-230 | MANCHESTER | 9533 | — | — |
| 636-239 | WASHINGTON | 9533 | — | — |
| 636-247 | CHESTERFLD | 9533 | 2002-05-16 | — |
| 636-255 | ST CHARLES | 9533 | — | Yes |
| 636-256 | MANCHESTER | 9533 | — | — |
| 636-257 | PACIFIC | 9533 | — | Yes |
| 636-261 | HARVESTER | 9533 | 2003-04-14 | Yes |
| 636-271 | PACIFIC | 9533 | — | Yes |
| 636-273 | POND | 9533 | — | Yes |
| 636-274 | CEDAR HILL | 9533 | — | Yes |
| 636-282 | MAXVILLE | 9533 | — | Yes |
| 636-285 | CEDAR HILL | 9533 | — | Yes |
| 636-287 | MAXVILLE | 9533 | — | Yes |
| 636-296 | MAXVILLE | 9533 | — | — |
| 636-300 | HARVESTER | 9533 | 2001-05-01 | Yes |
| 636-305 | FENTON | 9533 | — | — |
| 636-322 | ST CLAIR | 9533 | 2006-01-10 | Yes |
| 636-326 | FENTON | 9533 | — | Yes |
| 636-329 | HARVESTER | 9533 | 2001-05-01 | Yes |
| 636-337 | DE SOTO | 9533 | — | Yes |
| 636-343 | FENTON | 9533 | — | — |
| 636-344 | HARVESTER | 9533 | 2005-05-24 | Yes |
| 636-349 | FENTON | 9533 | — | — |
| 636-362 | HARVESTER | 9533 | 2013-04-18 | Yes |
| 636-375 | HIGH RIDGE | 9533 | — | Yes |
| 636-376 | HIGH RIDGE | 9533 | — | Yes |
| 636-386 | MANCHESTER | 9533 | — | Yes |
| 636-390 | WASHINGTON | 9533 | — | — |
| 636-391 | MANCHESTER | 9533 | — | — |
| 636-394 | MANCHESTER | 9533 | — | — |
| 636-405 | POND | 9533 | — | Yes |
| 636-422 | POND | 9533 | 2005-05-11 | Yes |
| 636-432 | WASHINGTON | 9533 | 2006-01-10 | Yes |
| 636-434 | PORTAGSIUX | 9533 | 2001-07-05 | Yes |
| 636-441 | HARVESTER | 9533 | — | — |
| 636-442 | HARVESTER | 9533 | — | Yes |
| 636-443 | ST CHARLES | 9533 | — | Yes |
| 636-447 | HARVESTER | 9533 | — | — |
| 636-451 | GRAYSUMMIT | 9533 | — | Yes |
| 636-452 | WARE | 9533 | — | Yes |
| 636-458 | POND | 9533 | — | — |
| 636-461 | IMPERIAL | 9533 | — | Yes |
| 636-464 | IMPERIAL | 9533 | — | — |
| 636-467 | IMPERIAL | 9533 | — | Yes |
| 636-475 | HERCUMPVLY | 9533 | — | Yes |
| 636-477 | HARVESTER | 9533 | — | Yes |
| 636-479 | HERCUMPVLY | 9533 | — | Yes |
| 636-496 | FENTON | 9533 | 2008-10-10 | Yes |
| 636-498 | HARVESTER | 9533 | — | Yes |
| 636-517 | VALLEYPARK | 9533 | 2001-07-05 | Yes |
| 636-519 | CHESTERFLD | 9533 | — | — |
| 636-525 | IMPERIAL | 9533 | 2001-07-05 | Yes |
| 636-527 | MANCHESTER | 9533 | — | — |
| 636-529 | VALLEYPARK | 9533 | — | Yes |
| 636-530 | CHESTERFLD | 9533 | — | — |
| 636-532 | CHESTERFLD | 9533 | — | — |
| 636-536 | CHESTERFLD | 9533 | — | Yes |
| 636-537 | CHESTERFLD | 9533 | — | — |
| 636-583 | UNION | 9533 | — | — |
| 636-584 | UNION | 9533 | — | Yes |
| 636-586 | DE SOTO | 9533 | — | — |
| 636-587 | EUREKA | 9533 | — | Yes |
| 636-629 | ST CLAIR | 9533 | — | — |
| 636-671 | HIGH RIDGE | 9533 | — | Yes |
| 636-677 | HIGH RIDGE | 9533 | — | — |
| 636-717 | FENTON | 9533 | — | Yes |
| 636-722 | HARVESTER | 9533 | — | — |
| 636-723 | ST CHARLES | 9533 | — | Yes |
| 636-724 | ST CHARLES | 9533 | — | — |
| 636-728 | CHESTERFLD | 9533 | — | Yes |
| 636-730 | CHESTERFLD | 9533 | — | Yes |
| 636-733 | CHESTERFLD | 9533 | — | Yes |
| 636-735 | CHESTERFLD | 9533 | — | Yes |
| 636-736 | CHESTERFLD | 9533 | — | Yes |
| 636-737 | CHESTERFLD | 9533 | — | — |
| 636-742 | GRAYSUMMIT | 9533 | — | Yes |
| 636-744 | UNION | 9533 | 2006-03-28 | Yes |
| 636-753 | PORTAGSIUX | 9533 | — | Yes |
| 636-789 | HILLSBORO | 9533 | — | Yes |
| 636-797 | HILLSBORO | 9533 | — | Yes |
| 636-825 | VALLEYPARK | 9533 | — | Yes |
| 636-827 | VALLEYPARK | 9533 | — | — |
| 636-851 | HARVESTER | 9533 | 2001-07-05 | Yes |
| 636-861 | VALLEYPARK | 9533 | — | — |
| 636-891 | MANCHESTER | 9533 | — | Yes |
| 636-896 | ST CHARLES | 9533 | — | Yes |
| 636-899 | PORTAGSIUX | 9533 | — | Yes |
| 636-916 | ST CHARLES | 9533 | — | — |
| 636-922 | HARVESTER | 9533 | — | Yes |
| 636-925 | ST CHARLES | 9533 | — | Yes |
| 636-926 | HARVESTER | 9533 | — | Yes |
| 636-928 | HARVESTER | 9533 | — | — |
| 636-931 | FSSCRSTLCY | 9533 | — | Yes |
| 636-933 | FSSCRSTLCY | 9533 | — | Yes |
| 636-936 | HARVESTER | 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.