All assignees
525 prefixes in 435 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 435-432 | PROMONTORY | 871E | 2019-01-23 | Yes |
| 435-433 | EUREKA | 2283 | — | — |
| 435-435 | — | — | ||
| 435-436 | MORONI | 2283 | — | — |
| 435-438 | BEAVER | 9636 | — | Yes |
| 435-439 | BERYL | 2286 | — | — |
| 435-441 | HOLDEN | 871E | 2019-01-23 | Yes |
| 435-444 | MNZMCRANTH | 4146 | 2006-05-17 | — |
| 435-445 | FOUNTAGREN | 2277 | — | — |
| 435-447 | FIELDING | 871E | 2018-10-19 | Yes |
| 435-448 | SCOFIELD | 2277 | — | — |
| 435-452 | BEARRIV CY | 4429 | — | Yes |
| 435-454 | ALTAMONT | 2287 | — | — |
| 435-456 | CAINEVILLE | 4611 | — | — |
| 435-458 | FIELDING | 4429 | — | Yes |
| 435-459 | MONTICELLO | 6571 | — | Yes |
| 435-462 | MTPLEASANT | 2277 | — | — |
| 435-463 | CEDAR CITY | 2286 | — | — |
| 435-465 | BRIGHAM CY | 7229 | 2015-01-22 | Yes |
| 435-466 | BEARRIV CY | 6571 | 2018-04-10 | Yes |
| 435-467 | ST GEORGE | 2286 | — | — |
| 435-469 | MTPLEASANT | 6010 | — | Yes |
| 435-471 | HOWELL | 4429 | — | — |
| 435-472 | PRICE | 1190 | — | — |
| 435-473 | HOWELL | 872A | — | — |
| 435-477 | PAROWAN | 9636 | — | Yes |
| 435-485 | BLANDING | 6571 | 2011-03-22 | Yes |
| 435-487 | PARK CITY | 7541 | — | — |
| 435-491 | BICKNELL | 6010 | 2004-12-10 | Yes |
| 435-494 | BRIGHAM CY | 3231 | 2002-11-04 | Yes |
| 435-495 | OAK CITY | 871E | 2019-01-23 | Yes |
| 435-496 | TOOELE | 6529 | — | Yes |
| 435-500 | DELTA | 871E | 2019-04-25 | Yes |
| 435-503 | HEBER CITY | 6010 | — | Yes |
| 435-511 | XXXXXXXXXX | MULT | — | — |
| 435-512 | LOGAN | 6529 | — | — |
| 435-513 | PARK CITY | 6529 | — | Yes |
| 435-514 | LOGAN | 7530 | — | Yes |
| 435-515 | BRIGHAM CY | 117F | 2015-01-28 | Yes |
| 435-518 | SALINA | 871E | — | — |
| 435-522 | ST GEORGE | 508J | 2017-11-16 | Yes |
| 435-523 | ST GEORGE | 871E | 2020-11-24 | Yes |
| 435-525 | ST GEORGE | 6529 | 2011-01-27 | Yes |
| 435-527 | MONROE | 9636 | — | Yes |
| 435-528 | GUNNISON | 2279 | — | — |
| 435-529 | SALINA | 9636 | — | Yes |
| 435-531 | CEDAR CITY | 6529 | — | Yes |
| 435-534 | LOGAN | 871E | 2020-11-09 | Yes |
| 435-535 | LOGAN | 3231 | — | Yes |
| 435-538 | BRIGHAM CY | 7176 | 2001-12-05 | Yes |
| 435-542 | HANKSVILLE | 1192 | — | — |
| 435-545 | RANDLETT | 2287 | — | — |
| 435-547 | BRIAN HEAD | 516J | 2021-04-12 | Yes |
| 435-548 | FRUITLAND | 2287 | — | — |
| 435-549 | VERNAL | 6529 | 2011-07-06 | Yes |
| 435-553 | BRIGHAM CY | 3231 | 2002-04-24 | Yes |
| 435-554 | LOGAN | 3231 | — | Yes |
| 435-555 | DIR ASST | MULT | — | — |
| 435-557 | LOGAN | 117F | 2015-06-04 | Yes |
| 435-558 | RICHFIELD | 6010 | 2001-04-27 | Yes |
| 435-559 | CEDAR CITY | 6010 | — | Yes |
| 435-562 | SALINA | 3231 | 2001-10-23 | Yes |
| 435-563 | LOGAN | 9636 | — | — |
| 435-564 | GREENRIVER | 2278 | — | — |
| 435-565 | PARK CITY | 3231 | 2002-09-18 | Yes |
| 435-566 | TOOELE | 5727 | 2002-08-13 | — |
| 435-567 | RICHFIELD | 516J | 2022-02-24 | Yes |
| 435-569 | MOAB | 516J | 2022-02-24 | Yes |
| 435-571 | PARK CITY | 3231 | 2001-10-23 | Yes |
| 435-572 | CEDAR CITY | 3231 | 2002-04-24 | Yes |
| 435-574 | ST GEORGE | 9636 | — | Yes |
| 435-575 | PARK CITY | 5727 | 2002-03-07 | — |
| 435-577 | CIRCLEVL | 2286 | — | — |
| 435-578 | TOOELE | 7229 | — | — |
| 435-579 | TOOELE | 7541 | — | Yes |
| 435-580 | NEPHI | 6529 | 2002-02-21 | Yes |
| 435-586 | CEDAR CITY | 9636 | — | — |
| 435-587 | MONTICELLO | 4429 | — | — |
| 435-590 | CEDAR CITY | 6571 | — | — |
| 435-592 | CEDAR CITY | 6571 | — | Yes |
| 435-599 | ST GEORGE | 965H | 2021-08-12 | Yes |
| 435-600 | PAROWAN | 965H | 2021-07-01 | Yes |
| 435-602 | PARK CITY | 6529 | — | Yes |
| 435-603 | LOGAN | 7530 | 2009-07-20 | Yes |
| 435-604 | PARK CITY | 7530 | — | Yes |
| 435-608 | PARK CITY | 7229 | — | — |
| 435-609 | CASTLEDALE | 6571 | — | Yes |
| 435-610 | NEPHI | 6571 | — | Yes |
| 435-611 | XXXXXXXXXX | MULT | — | — |
| 435-612 | MONROE | 3231 | 2002-04-24 | Yes |
| 435-613 | PRICE | 1190 | — | — |
| 435-615 | PARK CITY | 9636 | — | — |
| 435-616 | PANGUITCH | 2286 | — | — |
| 435-618 | PANGUITCH | 6571 | — | Yes |
| 435-619 | ST GEORGE | 6010 | — | Yes |
| 435-621 | VERNAL | 6529 | 2004-08-12 | Yes |
| 435-622 | FLATTOP | 2287 | — | Yes |
| 435-623 | NEPHI | 9636 | — | Yes |
| 435-624 | ANTIMONY | 2286 | — | — |
| 435-625 | BEAVER | 3231 | 2001-10-23 | 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.