SOUTHWESTERN BELL
307 prefixes in 972 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 972-982 | DALLAS | 9533 | — | Yes |
| 972-988 | GRANDPRARI | 9533 | — | Yes |
| 972-991 | DALLAS | 9533 | — | — |
| 972-994 | DALLAS | 9533 | — | Yes |
| 972-995 | DALLAS | 9533 | — | — |
| 972-996 | DALLAS | 9533 | — | Yes |
| 972-997 | DALLAS | 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.