SOUTHWESTERN BELL
274 prefixes in 512 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 512-654 | AUSTIN | 9533 | 2012-04-05 | Yes |
| 512-655 | AUSTIN | 9533 | 2012-04-05 | Yes |
| 512-669 | AUSTIN | 9533 | — | Yes |
| 512-670 | AUSTIN | 9533 | — | Yes |
| 512-671 | AUSTIN | 9533 | — | Yes |
| 512-672 | AUSTIN | 9533 | — | Yes |
| 512-673 | AUSTIN | 9533 | — | Yes |
| 512-674 | AUSTIN | 9533 | — | Yes |
| 512-693 | AUSTIN | 9533 | — | Yes |
| 512-703 | AUSTIN | 9533 | — | Yes |
| 512-704 | AUSTIN | 9533 | — | Yes |
| 512-706 | AUSTIN | 9533 | — | Yes |
| 512-707 | AUSTIN | 9533 | — | Yes |
| 512-708 | AUSTIN | 9533 | — | Yes |
| 512-712 | AUSTIN | 9533 | — | Yes |
| 512-716 | AUSTIN | 9533 | — | Yes |
| 512-719 | AUSTIN | 9533 | — | — |
| 512-730 | AUSTIN | 9533 | — | Yes |
| 512-732 | AUSTIN | 9533 | — | — |
| 512-733 | AUSTIN | 9533 | — | Yes |
| 512-741 | AUSTIN | 9533 | — | — |
| 512-742 | AUSTIN | 9533 | — | — |
| 512-768 | ADAMSVILLE | 9533 | — | Yes |
| 512-778 | LIBERTY HL | 9533 | — | Yes |
| 512-782 | AUSTIN | 9533 | — | Yes |
| 512-794 | AUSTIN | 9533 | — | — |
| 512-795 | AUSTIN | 9533 | — | Yes |
| 512-804 | AUSTIN | 9533 | — | Yes |
| 512-821 | AUSTIN | 9533 | — | — |
| 512-823 | AUSTIN | 9533 | — | Yes |
| 512-828 | AUSTIN | 9533 | — | Yes |
| 512-832 | AUSTIN | 9533 | — | — |
| 512-833 | AUSTIN | 9533 | — | — |
| 512-834 | AUSTIN | 9533 | — | — |
| 512-835 | AUSTIN | 9533 | — | Yes |
| 512-836 | AUSTIN | 9533 | — | — |
| 512-837 | AUSTIN | 9533 | — | — |
| 512-838 | AUSTIN | 9533 | — | Yes |
| 512-841 | AUSTIN | 9533 | — | — |
| 512-851 | AUSTIN | 9533 | — | Yes |
| 512-854 | AUSTIN | 9533 | — | Yes |
| 512-860 | AUSTIN | 9533 | — | Yes |
| 512-867 | AUSTIN | 9533 | — | Yes |
| 512-870 | AUSTIN | 9533 | — | Yes |
| 512-873 | AUSTIN | 9533 | — | — |
| 512-891 | AUSTIN | 9533 | — | — |
| 512-892 | AUSTIN | 9533 | — | — |
| 512-895 | AUSTIN | 9533 | — | Yes |
| 512-899 | AUSTIN | 9533 | — | — |
| 512-907 | AUSTIN | 9533 | — | — |
| 512-908 | AUSTIN | 9533 | — | — |
| 512-912 | AUSTIN | 9533 | — | Yes |
| 512-916 | AUSTIN | 9533 | — | — |
| 512-918 | AUSTIN | 9533 | — | — |
| 512-919 | AUSTIN | 9533 | — | Yes |
| 512-926 | AUSTIN | 9533 | — | — |
| 512-927 | AUSTIN | 9533 | — | Yes |
| 512-928 | AUSTIN | 9533 | — | — |
| 512-929 | AUSTIN | 9533 | — | — |
| 512-933 | AUSTIN | 9533 | — | — |
| 512-934 | AUSTIN | 9533 | — | Yes |
| 512-936 | AUSTIN | 9533 | — | — |
| 512-941 | AUSTIN | 9533 | — | — |
| 512-951 | XXXXXXXXXX | 9533 | — | — |
| 512-972 | AUSTIN | 9533 | — | Yes |
| 512-973 | AUSTIN | 9533 | — | — |
| 512-974 | AUSTIN | 9533 | — | — |
| 512-977 | AUSTIN | 9533 | — | Yes |
| 512-978 | AUSTIN | 9533 | — | Yes |
| 512-984 | AUSTIN | 9533 | — | — |
| 512-989 | AUSTIN | 9533 | — | — |
| 512-990 | AUSTIN | 9533 | — | — |
| 512-996 | AUSTIN | 9533 | — | Yes |
| 512-997 | AUSTIN | 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.