SOUTHWESTERN BELL
145 prefixes in 956 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 956-726 | LAREDO | 9533 | — | — |
| 956-727 | LAREDO | 9533 | — | — |
| 956-728 | LAREDO | 9533 | — | — |
| 956-729 | LAREDO | 9533 | — | — |
| 956-730 | HARLINGEN | 9533 | — | Yes |
| 956-748 | RIO HONDO | 9533 | — | Yes |
| 956-752 | HARLINGEN | 9533 | — | Yes |
| 956-753 | LAREDO | 9533 | — | — |
| 956-755 | BROWNSVL | 9533 | — | Yes |
| 956-760 | HARLINGEN | 9533 | — | — |
| 956-761 | PORTISABEL | 9533 | — | Yes |
| 956-764 | LAREDO | 9533 | — | Yes |
| 956-765 | ZAPATA | 9533 | — | Yes |
| 956-772 | PORTISABEL | 9533 | — | Yes |
| 956-781 | PHARR | 9533 | — | — |
| 956-782 | PHARR | 9533 | — | Yes |
| 956-783 | PHARR | 9533 | — | — |
| 956-784 | PHARR | 9533 | — | Yes |
| 956-786 | LAREDO | 9533 | 2011-07-20 | Yes |
| 956-787 | PHARR | 9533 | — | — |
| 956-790 | LAREDO | 9533 | — | Yes |
| 956-791 | LAREDO | 9533 | — | — |
| 956-794 | LAREDO | 9533 | — | Yes |
| 956-795 | LAREDO | 9533 | — | — |
| 956-796 | LAREDO | 9533 | — | — |
| 956-825 | MERCEDES | 9533 | — | Yes |
| 956-831 | BROWNSVL | 9533 | — | — |
| 956-832 | BROWNSVL | 9533 | — | Yes |
| 956-838 | BROWNSVL | 9533 | — | Yes |
| 956-843 | MCALLEN | 9533 | — | Yes |
| 956-848 | FALCON HTS | 9533 | — | Yes |
| 956-872 | MCALLEN | 9533 | 2004-11-16 | Yes |
| 956-882 | BROWNSVL | 9533 | 2004-11-16 | Yes |
| 956-926 | MCALLEN | 9533 | — | Yes |
| 956-928 | MCALLEN | 9533 | — | Yes |
| 956-943 | PORTISABEL | 9533 | — | Yes |
| 956-948 | ENCINAL | 9533 | — | Yes |
| 956-971 | MCALLEN | 9533 | — | Yes |
| 956-972 | MCALLEN | 9533 | — | — |
| 956-982 | BROWNSVL | 9533 | — | — |
| 956-983 | BROWNSVL | 9533 | — | Yes |
| 956-984 | MCALLEN | 9533 | — | Yes |
| 956-986 | BROWNSVL | 9533 | — | Yes |
| 956-992 | MCALLEN | 9533 | — | Yes |
| 956-994 | MCALLEN | 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.