SOUTHWESTERN BELL
145 prefixes in 956 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 956-205 | MISSION | 9533 | 2004-08-26 | Yes |
| 956-217 | MCALLEN | 9533 | 2006-11-07 | Yes |
| 956-228 | HARLINGEN | 9533 | 2001-07-10 | — |
| 956-233 | LOSFRESNOS | 9533 | — | Yes |
| 956-254 | LOSFRESNOS | 9533 | 2007-11-29 | Yes |
| 956-262 | EDCOUCH | 9533 | — | — |
| 956-273 | LAREDO | 9533 | 2010-11-24 | Yes |
| 956-276 | SAN BENITO | 9533 | 2001-06-25 | Yes |
| 956-283 | PHARR | 9533 | — | Yes |
| 956-287 | EDINBURG | 9533 | — | Yes |
| 956-289 | EDINBURG | 9533 | — | Yes |
| 956-291 | HARLINGEN | 9533 | — | Yes |
| 956-292 | EDINBURG | 9533 | — | Yes |
| 956-296 | BROWNSVL | 9533 | 2014-06-30 | Yes |
| 956-316 | EDINBURG | 9533 | — | — |
| 956-318 | EDINBURG | 9533 | — | — |
| 956-323 | MISSION | 9533 | 2004-02-24 | Yes |
| 956-326 | LAREDO | 9533 | — | Yes |
| 956-350 | BROWNSVL | 9533 | — | — |
| 956-361 | SAN BENITO | 9533 | — | — |
| 956-362 | MCALLEN | 9533 | 2008-11-05 | Yes |
| 956-364 | HARLINGEN | 9533 | — | Yes |
| 956-365 | HARLINGEN | 9533 | — | Yes |
| 956-366 | HARLINGEN | 9533 | — | Yes |
| 956-380 | EDINBURG | 9533 | — | — |
| 956-381 | EDINBURG | 9533 | — | Yes |
| 956-383 | EDINBURG | 9533 | — | — |
| 956-384 | EDINBURG | 9533 | — | — |
| 956-385 | EDINBURG | 9533 | — | — |
| 956-386 | EDINBURG | 9533 | — | Yes |
| 956-387 | EDINBURG | 9533 | — | — |
| 956-388 | EDINBURG | 9533 | — | Yes |
| 956-389 | HARLINGEN | 9533 | — | Yes |
| 956-390 | HARLINGEN | 9533 | — | — |
| 956-392 | HARLINGEN | 9533 | — | Yes |
| 956-393 | EDINBURG | 9533 | — | Yes |
| 956-399 | SAN BENITO | 9533 | — | — |
| 956-412 | HARLINGEN | 9533 | — | — |
| 956-421 | HARLINGEN | 9533 | — | — |
| 956-423 | HARLINGEN | 9533 | — | — |
| 956-424 | MISSION | 9533 | — | Yes |
| 956-425 | HARLINGEN | 9533 | — | — |
| 956-427 | HARLINGEN | 9533 | — | — |
| 956-428 | HARLINGEN | 9533 | — | — |
| 956-429 | MCALLEN | 9533 | — | Yes |
| 956-430 | HARLINGEN | 9533 | — | — |
| 956-440 | HARLINGEN | 9533 | — | Yes |
| 956-444 | HARLINGEN | 9533 | — | Yes |
| 956-461 | DONNA | 9533 | — | Yes |
| 956-464 | DONNA | 9533 | — | — |
| 956-473 | LAREDO | 9533 | — | Yes |
| 956-485 | SULLIVANCY | 9533 | — | Yes |
| 956-504 | BROWNSVL | 9533 | — | — |
| 956-514 | MERCEDES | 9533 | — | — |
| 956-519 | MISSION | 9533 | — | — |
| 956-523 | LAREDO | 9533 | 2001-03-01 | Yes |
| 956-541 | BROWNSVL | 9533 | — | — |
| 956-542 | BROWNSVL | 9533 | — | — |
| 956-544 | BROWNSVL | 9533 | — | — |
| 956-546 | BROWNSVL | 9533 | — | — |
| 956-547 | BROWNSVL | 9533 | — | Yes |
| 956-548 | BROWNSVL | 9533 | — | — |
| 956-550 | BROWNSVL | 9533 | — | Yes |
| 956-554 | BROWNSVL | 9533 | — | Yes |
| 956-565 | MERCEDES | 9533 | — | — |
| 956-574 | BROWNSVL | 9533 | — | Yes |
| 956-577 | HARLINGEN | 9533 | 2002-02-05 | Yes |
| 956-578 | MCALLEN | 9533 | 2002-02-05 | Yes |
| 956-579 | BROWNSVL | 9533 | 2002-02-05 | Yes |
| 956-580 | MISSION | 9533 | — | — |
| 956-581 | MISSION | 9533 | — | — |
| 956-583 | MISSION | 9533 | — | Yes |
| 956-584 | MISSION | 9533 | — | — |
| 956-585 | MISSION | 9533 | — | — |
| 956-587 | EDINBURG | 9533 | 2007-03-12 | Yes |
| 956-610 | HARLINGEN | 9533 | 2001-05-24 | — |
| 956-618 | MCALLEN | 9533 | — | — |
| 956-630 | MCALLEN | 9533 | — | — |
| 956-631 | MCALLEN | 9533 | — | — |
| 956-632 | MCALLEN | 9533 | — | — |
| 956-661 | MCALLEN | 9533 | — | Yes |
| 956-664 | MCALLEN | 9533 | — | — |
| 956-665 | EDINBURG | 9533 | 2010-04-05 | Yes |
| 956-668 | MCALLEN | 9533 | — | — |
| 956-682 | MCALLEN | 9533 | — | — |
| 956-683 | MCALLEN | 9533 | — | Yes |
| 956-686 | MCALLEN | 9533 | — | — |
| 956-687 | MCALLEN | 9533 | — | — |
| 956-688 | MCALLEN | 9533 | — | Yes |
| 956-693 | LAREDO | 9533 | 2001-11-15 | Yes |
| 956-698 | BROWNSVL | 9533 | 2001-03-09 | Yes |
| 956-702 | PHARR | 9533 | — | — |
| 956-712 | LAREDO | 9533 | — | — |
| 956-717 | LAREDO | 9533 | — | — |
| 956-718 | LAREDO | 9533 | — | — |
| 956-721 | LAREDO | 9533 | — | Yes |
| 956-722 | LAREDO | 9533 | — | — |
| 956-723 | LAREDO | 9533 | — | — |
| 956-724 | LAREDO | 9533 | — | — |
| 956-725 | LAREDO | 9533 | — | — |
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.