All assignees
525 prefixes in 435 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 435-302 | KAMAS | 6571 | 2021-01-28 | Yes |
| 435-303 | BEARRIV CY | 6571 | 2021-01-26 | Yes |
| 435-304 | RICHFIELD | 7530 | — | Yes |
| 435-305 | JORDANELLE | 6010 | 2015-12-18 | Yes |
| 435-306 | EUREKA | 6010 | 2021-11-12 | Yes |
| 435-307 | — | — | ||
| 435-308 | MONUMNTVLY | 6010 | 2021-07-21 | Yes |
| 435-309 | GLNCNYONCY | 871E | 2021-04-26 | Yes |
| 435-310 | BEAVER | 6010 | 2002-12-30 | Yes |
| 435-311 | XXXXXXXXXX | MULT | — | — |
| 435-312 | HALCHITA | 6010 | 2021-09-24 | — |
| 435-313 | ST GEORGE | 6529 | 2001-08-17 | — |
| 435-314 | EPHRAIM | 6529 | 2010-07-23 | Yes |
| 435-315 | HEBER CITY | 318J | 2012-11-16 | Yes |
| 435-316 | MONUMNTVLY | 4451 | 2012-03-28 | Yes |
| 435-317 | LOGAN | 490J | 2021-12-17 | Yes |
| 435-318 | IBAPAH | 6010 | 2021-11-12 | Yes |
| 435-319 | ST GEORGE | 6529 | 2011-09-19 | Yes |
| 435-320 | MNZMCRANTH | 6010 | 2021-09-24 | — |
| 435-321 | KAMAS | 6571 | 2021-10-14 | Yes |
| 435-322 | DUCHESNE | 6010 | 2010-10-18 | Yes |
| 435-323 | PARKVALLEY | 6010 | 2021-11-12 | Yes |
| 435-324 | HEBER CITY | 871E | — | Yes |
| 435-325 | MEADOW | 871E | 2019-01-23 | Yes |
| 435-326 | MARYSVALE | 2286 | — | — |
| 435-327 | CEDAR CITY | 6529 | 2001-08-17 | Yes |
| 435-328 | HEBER CITY | 6529 | 2024-05-23 | Yes |
| 435-329 | BOULDER | 6010 | 2023-01-27 | Yes |
| 435-330 | CANNONVL | 6010 | 2023-01-27 | Yes |
| 435-331 | DUCK CREEK | 6010 | 2023-01-27 | Yes |
| 435-332 | HANKSVILLE | 6010 | 2023-02-01 | Yes |
| 435-333 | PARK CITY | 3881 | 2002-01-04 | — |
| 435-334 | FILLMORE | 871E | 2020-04-20 | Yes |
| 435-335 | BOULDER | 2286 | — | — |
| 435-336 | COALVILLE | 2288 | 2001-05-02 | — |
| 435-337 | LAKEPOWELL | 871E | 2019-01-23 | Yes |
| 435-338 | TOOELE | 7229 | — | Yes |
| 435-339 | BRIGHAM CY | 6529 | 2012-08-15 | Yes |
| 435-340 | EPHRAIM | 6010 | — | Yes |
| 435-341 | MONROE | 117F | 2022-01-31 | Yes |
| 435-342 | DNGLNG RPE | 6010 | 2023-02-01 | Yes |
| 435-343 | MANILA | 6010 | 2023-02-01 | Yes |
| 435-344 | LA SAL | 871E | 2019-01-23 | Yes |
| 435-345 | THOMPSON | 871E | 2019-01-23 | Yes |
| 435-346 | PARK CITY | 6571 | 2024-10-17 | Yes |
| 435-347 | — | — | ||
| 435-348 | FILLMORE | 965H | 2021-07-01 | Yes |
| 435-349 | — | — | ||
| 435-350 | COALVILLE | 6571 | 2023-02-10 | Yes |
| 435-351 | ST GEORGE | 871E | 2023-04-11 | Yes |
| 435-352 | HEBER CITY | 6571 | 2021-02-01 | Yes |
| 435-353 | NEOLA | 2287 | — | — |
| 435-354 | TOOELE | 6010 | 2023-08-09 | Yes |
| 435-355 | MOAB | 683H | 2012-03-05 | Yes |
| 435-356 | DELTA | 965H | 2021-07-01 | Yes |
| 435-357 | ST GEORGE | 6010 | 2023-09-06 | Yes |
| 435-358 | COALVILLE | 6571 | 2023-09-21 | Yes |
| 435-359 | ST GEORGE | 871E | — | Yes |
| 435-360 | ST GEORGE | 6529 | 2024-05-31 | Yes |
| 435-361 | LOGAN | 871E | 2024-03-18 | Yes |
| 435-362 | THOMPSON | 831J | 2025-03-03 | Yes |
| 435-363 | LOGAN | 3231 | — | Yes |
| 435-364 | MANTI | 441F | 2009-02-26 | — |
| 435-365 | HEBER CITY | 6529 | 2025-08-28 | Yes |
| 435-366 | ST GEORGE | 641H | 2025-09-12 | Yes |
| 435-367 | LAPOINT | 1772 | 2026-09-08 | Yes |
| 435-368 | LOGAN | 871E | 2025-09-18 | Yes |
| 435-369 | BRIGHAM CY | 6529 | 2025-12-03 | Yes |
| 435-370 | DUTCH JOHN | 1772 | 2026-09-10 | Yes |
| 435-371 | MANILA | 1772 | 2026-09-10 | Yes |
| 435-374 | LOGAN | 6529 | 2007-10-25 | Yes |
| 435-375 | ST GEORGE | 6010 | 2018-12-20 | Yes |
| 435-376 | FRUITLAND | 1772 | 2026-09-08 | Yes |
| 435-377 | ST GEORGE | 641H | 2026-09-15 | Yes |
| 435-381 | CASTLEDALE | 2278 | — | — |
| 435-383 | CEDAR CITY | 871E | — | Yes |
| 435-384 | CASTLEDALE | 2278 | — | — |
| 435-385 | — | — | ||
| 435-386 | MINERSVL | 2286 | — | — |
| 435-387 | MILFORD | 2286 | — | — |
| 435-393 | PAROWAN | 6010 | 2006-09-08 | Yes |
| 435-395 | HEBER CITY | 6010 | 2018-12-17 | Yes |
| 435-400 | COALVILLE | 6571 | 2005-09-06 | Yes |
| 435-401 | ROOSEVELT | 6010 | 2008-02-25 | Yes |
| 435-406 | DELTA | 6571 | — | Yes |
| 435-407 | TABIONA | 1772 | 2026-05-05 | Yes |
| 435-408 | ALTAMONT | 1772 | 2026-05-05 | Yes |
| 435-409 | SCIPIO | 871E | 2018-10-19 | Yes |
| 435-410 | RANDLETT | 1772 | 2026-05-05 | Yes |
| 435-411 | XXXXXXXXXX | MULT | — | — |
| 435-412 | GLNCNYONCY | 871E | 2007-10-18 | Yes |
| 435-414 | ST GEORGE | 6529 | 2011-11-21 | Yes |
| 435-417 | NEPHI | 871E | — | — |
| 435-418 | BEAVER | 6571 | — | Yes |
| 435-419 | MONTICELLO | 6571 | — | Yes |
| 435-421 | BEAVER | 6571 | — | Yes |
| 435-422 | HOWELL | 871E | 2018-10-19 | Yes |
| 435-425 | BICKNELL | 2286 | — | — |
| 435-427 | FAIRVIEW | 2277 | — | — |
| 435-429 | ST GEORGE | 117F | 2015-02-02 | 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.