SOUTHWESTERN BELL
283 prefixes in 281 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 281-758 | CYPRESS | 9533 | 2005-12-08 | Yes |
| 281-759 | HSTNSUBURB | 9533 | — | Yes |
| 281-760 | HSTNSUBURB | 9533 | — | Yes |
| 281-765 | BAMMEL | 9533 | — | — |
| 281-774 | BAMMEL | 9533 | — | Yes |
| 281-775 | BAMMEL | 9533 | — | Yes |
| 281-776 | HSTNSUBURB | 9533 | 2001-12-27 | — |
| 281-784 | WESTFIELD | 9533 | — | Yes |
| 281-792 | APOLLO | 9533 | — | — |
| 281-807 | SATSUMA | 9533 | — | — |
| 281-810 | HSTNSUBURB | 9533 | — | Yes |
| 281-820 | HSTNSUBURB | 9533 | — | — |
| 281-821 | WESTFIELD | 9533 | — | — |
| 281-824 | ALVIN | 9533 | — | Yes |
| 281-825 | SPRING | 9533 | — | Yes |
| 281-826 | TOMBALL | 9533 | — | Yes |
| 281-829 | BARKER | 9533 | — | Yes |
| 281-835 | HSTNSUBURB | 9533 | — | Yes |
| 281-842 | LA PORTE | 9533 | — | Yes |
| 281-847 | HSTNSUBURB | 9533 | — | — |
| 281-853 | APOLLO | 9533 | — | Yes |
| 281-855 | LANGHAMCRK | 9533 | — | — |
| 281-856 | LANGHAMCRK | 9533 | — | — |
| 281-858 | LANGHAMCRK | 9533 | — | Yes |
| 281-859 | LANGHAMCRK | 9533 | — | — |
| 281-860 | CHANNELVW | 9533 | — | Yes |
| 281-861 | LANGHAMCRK | 9533 | — | Yes |
| 281-862 | CHANNELVW | 9533 | — | Yes |
| 281-863 | SPRING | 9533 | — | Yes |
| 281-864 | CHANNELVW | 9533 | — | Yes |
| 281-866 | BAMMEL | 9533 | — | Yes |
| 281-867 | LA PORTE | 9533 | — | Yes |
| 281-870 | HSTNSUBURB | 9533 | — | Yes |
| 281-871 | BAMMEL | 9533 | — | Yes |
| 281-872 | BAMMEL | 9533 | — | Yes |
| 281-873 | BAMMEL | 9533 | — | — |
| 281-874 | BAMMEL | 9533 | — | — |
| 281-875 | BAMMEL | 9533 | — | Yes |
| 281-876 | BAMMEL | 9533 | — | Yes |
| 281-877 | BAMMEL | 9533 | — | Yes |
| 281-878 | HSTNSUBURB | 9533 | — | Yes |
| 281-879 | HSTNSUBURB | 9533 | — | — |
| 281-880 | BAMMEL | 9533 | — | — |
| 281-882 | SPRING | 9533 | — | Yes |
| 281-884 | DEER PARK | 9533 | — | Yes |
| 281-890 | SATSUMA | 9533 | — | — |
| 281-891 | BAMMEL | 9533 | — | Yes |
| 281-893 | BAMMEL | 9533 | — | — |
| 281-894 | SATSUMA | 9533 | — | — |
| 281-895 | BAMMEL | 9533 | — | Yes |
| 281-897 | SATSUMA | 9533 | — | — |
| 281-899 | HSTNSUBURB | 9533 | — | Yes |
| 281-907 | SPRING | 9533 | — | Yes |
| 281-909 | SEABROOK | 9533 | — | Yes |
| 281-919 | BAMMEL | 9533 | — | Yes |
| 281-920 | HSTNSUBURB | 9533 | — | Yes |
| 281-922 | HSTNSUBURB | 9533 | — | Yes |
| 281-926 | BAMMEL | 9533 | — | — |
| 281-927 | BAMMEL | 9533 | — | — |
| 281-929 | HSTNSUBURB | 9533 | — | Yes |
| 281-930 | DEER PARK | 9533 | — | Yes |
| 281-931 | HSTNSUBURB | 9533 | — | — |
| 281-933 | HSTNSUBURB | 9533 | — | — |
| 281-936 | HOUSTON | 9533 | 2001-10-22 | Yes |
| 281-937 | SMITHERSLK | 9533 | — | Yes |
| 281-939 | SPRING | 9533 | 2017-10-17 | Yes |
| 281-955 | SATSUMA | 9533 | — | — |
| 281-966 | HSTNSUBURB | 9533 | — | Yes |
| 281-970 | SATSUMA | 9533 | — | — |
| 281-978 | HSTNSUBURB | 9533 | — | Yes |
| 281-983 | HSTNSUBURB | 9533 | — | — |
| 281-985 | HSTNSUBURB | 9533 | — | Yes |
| 281-986 | HSTNSUBURB | 9533 | — | Yes |
| 281-987 | HSTNSUBURB | 9533 | — | Yes |
| 281-988 | HSTNSUBURB | 9533 | — | — |
| 281-990 | APOLLO | 9533 | — | Yes |
| 281-991 | HSTNSUBURB | 9533 | — | — |
| 281-992 | FRIENDSWD | 9533 | — | Yes |
| 281-993 | FRIENDSWD | 9533 | — | Yes |
| 281-996 | FRIENDSWD | 9533 | — | — |
| 281-997 | HSTNSUBURB | 9533 | — | — |
| 281-998 | HSTNSUBURB | 9533 | — | — |
| 281-999 | HSTNSUBURB | 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.