All assignees
766 prefixes in 346 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 346-200 | HOUSTON | 903C | 2015-03-17 | Yes |
| 346-201 | HOUSTON | 7239 | 2014-11-26 | Yes |
| 346-202 | BAMMEL | 903C | 2014-12-01 | Yes |
| 346-203 | HSTNSUBURB | 829J | 2014-12-16 | Yes |
| 346-204 | HOUSTON | 508J | 2015-08-18 | Yes |
| 346-205 | LANGHAMCRK | 508J | 2015-05-05 | Yes |
| 346-206 | SATSUMA | 903C | 2014-12-24 | Yes |
| 346-207 | HSTNSUBURB | 9533 | 2014-12-16 | Yes |
| 346-208 | DICKINSON | 6506 | 2014-12-16 | Yes |
| 346-209 | LIVERPOOL | 508J | 2015-05-05 | Yes |
| 346-210 | RICHMNRNBG | 6701 | 2022-09-02 | Yes |
| 346-211 | XXXXXXXXXX | MULT | — | — |
| 346-212 | HOUSTON | 6701 | — | Yes |
| 346-213 | LANGHAMCRK | 6534 | 2015-04-08 | Yes |
| 346-214 | HOUSTON | 903C | 2015-12-08 | Yes |
| 346-215 | ALVIN | 903C | 2014-12-23 | Yes |
| 346-216 | BAYTOWN | 7239 | 2015-01-26 | Yes |
| 346-217 | HOUSTON | 6534 | 2015-03-25 | Yes |
| 346-218 | CYPRESS | 6701 | 2015-03-02 | Yes |
| 346-219 | HSTNSUBURB | 318J | 2015-01-28 | Yes |
| 346-220 | SPRING | 903C | 2015-12-23 | Yes |
| 346-221 | HOUSTON | 6534 | 2015-02-03 | Yes |
| 346-222 | LA PORTE | 319D | 2014-01-15 | Yes |
| 346-223 | HOUSTON | 318J | 2016-02-04 | Yes |
| 346-224 | SPRING | 318J | 2015-06-22 | Yes |
| 346-225 | TOMBALL | 6534 | 2015-07-07 | Yes |
| 346-226 | HOUSTON | 318J | 2016-02-04 | Yes |
| 346-227 | HOUSTON | 318J | 2016-02-04 | Yes |
| 346-228 | HOUSTON | 6534 | 2015-03-25 | Yes |
| 346-229 | HSTNSUBURB | 6114 | 2015-06-22 | Yes |
| 346-230 | APOLLO | 903C | 2016-02-16 | Yes |
| 346-231 | HOUSTON | 6114 | 2015-06-22 | Yes |
| 346-232 | HOUSTON | 7239 | 2016-01-29 | Yes |
| 346-233 | BAYTOWN | 903C | 2016-03-03 | Yes |
| 346-234 | HOUSTON | 6534 | 2015-03-25 | Yes |
| 346-235 | BAMMEL | 903C | 2016-05-27 | Yes |
| 346-236 | TOMBALL | 6534 | 2016-05-04 | Yes |
| 346-237 | HOUSTON | 6506 | — | Yes |
| 346-238 | HOUSTON | 7074 | 2016-04-19 | Yes |
| 346-239 | RICHMNRNBG | 6701 | 2015-11-13 | Yes |
| 346-240 | HOUSTON | 318J | 2015-06-22 | Yes |
| 346-241 | HOUSTON | 903C | 2016-07-06 | Yes |
| 346-242 | LANGHAMCRK | 6534 | 2017-01-05 | Yes |
| 346-243 | BARKER | 5562 | 2017-01-17 | Yes |
| 346-244 | SATSUMA | 5562 | 2017-01-17 | Yes |
| 346-245 | STAFFORD | 5562 | 2017-01-17 | Yes |
| 346-246 | TOMBALL | 9533 | 2017-03-27 | Yes |
| 346-247 | HOUSTON | 903C | 2014-02-03 | Yes |
| 346-248 | PINEHURST | 516C | 2015-06-22 | Yes |
| 346-249 | BAMMEL | 6701 | 2017-03-27 | Yes |
| 346-250 | HOUSTON | 197D | 2017-05-03 | Yes |
| 346-251 | BARKER | 004F | 2015-08-03 | Yes |
| 346-252 | HSTNSUBURB | 7138 | 2016-01-05 | Yes |
| 346-253 | MANVEL | 6534 | 2016-04-06 | Yes |
| 346-254 | CYPRESS | 6534 | 2017-03-10 | Yes |
| 346-255 | CHANNELVW | 5562 | 2017-03-28 | Yes |
| 346-256 | HOUSTON | 6701 | 2015-11-25 | Yes |
| 346-257 | KATY | 6114 | 2017-05-15 | Yes |
| 346-258 | SHELDON | 903C | 2016-05-11 | Yes |
| 346-259 | BAYTOWN | 7138 | 2017-03-16 | Yes |
| 346-260 | SATSUMA | 6534 | 2015-12-28 | Yes |
| 346-261 | PORTER | 6534 | 2017-05-25 | Yes |
| 346-262 | HOUSTON | 6506 | 2016-04-20 | Yes |
| 346-263 | BAYTOWN | 6534 | 2017-06-15 | Yes |
| 346-264 | BARKER | 5562 | 2017-07-17 | Yes |
| 346-265 | HOUSTON | 9533 | 2017-07-18 | Yes |
| 346-266 | HOUSTON | 004F | 2017-07-19 | Yes |
| 346-267 | HOUSTON | 6506 | — | Yes |
| 346-268 | SPRING | 6506 | 2017-09-07 | Yes |
| 346-269 | HSTNSUBURB | 6534 | 2017-09-07 | Yes |
| 346-270 | BAMMEL | 318J | 2015-08-18 | Yes |
| 346-271 | FRIENDSWD | 004F | 2017-09-07 | Yes |
| 346-272 | HOUSTON | 7138 | 2017-09-20 | Yes |
| 346-273 | TOMBALL | 6534 | 2017-09-20 | Yes |
| 346-274 | HOUSTON | 6506 | 2017-09-22 | Yes |
| 346-275 | HSTNSUBURB | 903C | 2017-10-03 | Yes |
| 346-276 | BAMMEL | 6701 | 2015-11-05 | Yes |
| 346-277 | SATSUMA | 7138 | 2017-10-03 | Yes |
| 346-278 | MANVEL | 6534 | 2017-10-04 | Yes |
| 346-279 | SUGAR LAND | 7239 | 2017-10-18 | Yes |
| 346-280 | CYPRESS | 6701 | 2017-10-25 | Yes |
| 346-281 | HOUSTON | 6701 | 2022-09-02 | Yes |
| 346-282 | CHANNELVW | 5562 | 2017-11-03 | Yes |
| 346-283 | STAFFORD | 5562 | 2017-11-15 | Yes |
| 346-284 | BEACH CITY | 5562 | 2017-11-15 | Yes |
| 346-285 | BAMMEL | 6534 | 2017-11-22 | Yes |
| 346-286 | HOUSTON | 9533 | 2017-04-11 | Yes |
| 346-287 | LANGHAMCRK | 6506 | 2017-12-08 | Yes |
| 346-288 | BEACH CITY | 5562 | 2017-01-17 | Yes |
| 346-289 | DICKINSON | 6701 | 2017-12-11 | Yes |
| 346-290 | BAMMEL | 6701 | 2017-12-20 | Yes |
| 346-291 | HSTNSUBURB | 6534 | 2017-12-26 | Yes |
| 346-292 | BAYTOWN | 7074 | 2017-12-26 | Yes |
| 346-293 | HOUSTON | 6506 | 2018-01-16 | Yes |
| 346-294 | HOUSTON | 763H | 2018-01-17 | Yes |
| 346-295 | ARCOLA | 903C | 2018-02-07 | Yes |
| 346-296 | PINEHURST | 114J | 2018-02-23 | Yes |
| 346-297 | HSTNSUBURB | 004F | 2018-03-09 | Yes |
| 346-298 | SPRING | 004F | 2018-03-09 | Yes |
| 346-299 | HOUSTON | 903C | 2017-08-16 | 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.