All assignees
800 prefixes in 281 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 281-300 | HOUSTON | 5562 | — | Yes |
| 281-301 | BAMMEL | 7670 | — | Yes |
| 281-302 | SUGAR LAND | 7670 | — | Yes |
| 281-303 | BEACH CITY | 4344 | — | Yes |
| 281-304 | CYPRESS | 9533 | — | Yes |
| 281-305 | PINEHURST | 6114 | 2002-06-26 | Yes |
| 281-306 | SPLENDORA | 6114 | 2002-06-26 | Yes |
| 281-307 | LA PORTE | 903C | — | Yes |
| 281-308 | BAMMEL | 6591 | — | — |
| 281-309 | DICKINSON | 4344 | — | Yes |
| 281-310 | HSTNSUBURB | 7421 | — | Yes |
| 281-311 | XXXXXXXXXX | MULT | — | — |
| 281-312 | HUMBLE | 2114 | — | Yes |
| 281-313 | SUGAR LAND | 2147 | — | — |
| 281-314 | SUGAR LAND | 2147 | — | — |
| 281-315 | BAMMEL | 9533 | — | Yes |
| 281-316 | LEAGUECITY | 4344 | — | — |
| 281-317 | FRIENDSWD | 903C | — | Yes |
| 281-318 | HUMBLE | 7670 | — | Yes |
| 281-319 | HUMBLE | 2114 | — | — |
| 281-320 | TOMBALL | 9533 | — | Yes |
| 281-321 | SUGAR LAND | 2147 | — | — |
| 281-322 | SUGAR LAND | 2147 | — | — |
| 281-323 | SPRING | 9533 | — | Yes |
| 281-324 | HUFFMAN | 4344 | — | Yes |
| 281-325 | SUGAR LAND | 2147 | — | — |
| 281-326 | KEMAH | 4344 | — | Yes |
| 281-327 | SUGAR LAND | 2147 | — | — |
| 281-328 | CROSBY | 4344 | — | — |
| 281-329 | SUGAR LAND | 2147 | — | — |
| 281-330 | HSTNSUBURB | 5562 | 2002-01-24 | Yes |
| 281-331 | ALVIN | 9533 | — | — |
| 281-332 | LEAGUECITY | 4344 | — | — |
| 281-333 | KEMAH | 2154 | — | — |
| 281-334 | KEMAH | 4344 | — | — |
| 281-335 | KEMAH | 2154 | — | Yes |
| 281-336 | KEMAH | 2154 | — | Yes |
| 281-337 | DICKINSON | 4344 | — | — |
| 281-338 | LEAGUECITY | 4344 | — | — |
| 281-339 | KEMAH | 4344 | — | Yes |
| 281-340 | SUGAR LAND | 2147 | — | — |
| 281-341 | RICHMNRNBG | 9533 | — | — |
| 281-342 | RICHMNRNBG | 9533 | — | — |
| 281-343 | SMITHERSLK | 9533 | — | Yes |
| 281-344 | RICHMNRNBG | 9533 | — | Yes |
| 281-345 | LANGHAMCRK | 9533 | — | — |
| 281-346 | VLY LODGE | 9533 | — | Yes |
| 281-347 | KATY | 2072 | — | — |
| 281-348 | HUMBLE | 2114 | — | Yes |
| 281-349 | HSTNSUBURB | 6630 | — | — |
| 281-350 | SPRING | 9533 | — | — |
| 281-351 | TOMBALL | 9533 | — | — |
| 281-352 | HOUSTON | 6534 | — | — |
| 281-353 | SPRING | 9533 | — | — |
| 281-354 | PORTER | 2114 | — | — |
| 281-355 | SPRING | 9533 | — | — |
| 281-356 | PINEHURST | 9533 | — | Yes |
| 281-357 | TOMBALL | 9533 | — | Yes |
| 281-358 | HUMBLE | 2114 | — | — |
| 281-359 | HUMBLE | 2114 | — | — |
| 281-360 | HUMBLE | 2114 | — | — |
| 281-361 | HUMBLE | 2114 | — | — |
| 281-362 | SPRING | 9533 | — | Yes |
| 281-363 | SPRING | 9533 | — | — |
| 281-364 | SPRING | 9533 | — | — |
| 281-365 | HOUSTON | 6114 | 2017-05-01 | Yes |
| 281-366 | HSTNSUBURB | 7239 | — | — |
| 281-367 | SPRING | 9533 | — | — |
| 281-368 | HSTNSUBURB | 9533 | — | — |
| 281-369 | ROSHARON | 4344 | — | Yes |
| 281-370 | TOMBALL | 9533 | — | — |
| 281-371 | KATY | 2109 | — | Yes |
| 281-372 | HSTNSUBURB | 9533 | — | Yes |
| 281-373 | CYPRESS | 9533 | — | — |
| 281-374 | TOMBALL | 9533 | — | Yes |
| 281-375 | BROOKSHIRE | 2109 | — | Yes |
| 281-376 | TOMBALL | 9533 | — | — |
| 281-377 | BAMMEL | 7239 | — | Yes |
| 281-378 | TOMBALL | 9533 | — | Yes |
| 281-379 | TOMBALL | 9533 | — | — |
| 281-380 | HOUSTON | 6506 | — | — |
| 281-381 | HOUSTON | 6506 | — | — |
| 281-382 | HOUSTON | 6506 | — | — |
| 281-383 | BEACH CITY | 4344 | — | Yes |
| 281-384 | HOUSTON | 6506 | — | — |
| 281-385 | MONTBLVIEU | 4344 | — | Yes |
| 281-386 | HOUSTON | 6506 | — | — |
| 281-387 | HOUSTON | 6506 | — | — |
| 281-388 | ALVIN | 9533 | — | — |
| 281-389 | HOUSTON | 6506 | — | — |
| 281-390 | HOUSTON | 9533 | — | — |
| 281-391 | KATY | 2109 | — | — |
| 281-392 | KATY | 2072 | — | — |
| 281-393 | LIVERPOOL | 9533 | — | Yes |
| 281-394 | KATY | 2109 | — | Yes |
| 281-395 | KATY | 2072 | — | Yes |
| 281-396 | KATY | 2109 | — | Yes |
| 281-397 | BAMMEL | 9533 | — | Yes |
| 281-398 | BARKER | 9533 | — | — |
| 281-399 | SPLENDORA | 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.