All assignees
778 prefixes in 509 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 509-500 | ASOTIN | 6121 | — | Yes |
| 509-501 | ODESSA | 3229 | 2020-07-06 | Yes |
| 509-502 | SUNNYSIDE | 5812 | 2019-08-13 | Yes |
| 509-503 | SPOKANE | 597F | 2019-07-30 | Yes |
| 509-504 | YAKIMA | 6529 | 2020-07-09 | Yes |
| 509-505 | SPOKANE | 006F | 2019-02-14 | Yes |
| 509-506 | YAKIMA | 5812 | 2020-09-23 | Yes |
| 509-507 | DEER PARK | 475J | — | Yes |
| 509-508 | SPOKANE | 425J | 2020-07-23 | Yes |
| 509-509 | YAKIMA | 483E | 2022-09-27 | Yes |
| 509-510 | OTHELLO | 3229 | 2020-08-17 | Yes |
| 509-511 | XXXXXXXXXX | MULT | — | — |
| 509-512 | MOSES LAKE | 6529 | 2020-10-27 | Yes |
| 509-513 | NORTHPORT | 483E | 2020-12-21 | Yes |
| 509-514 | SPOKANE | 520K | 2021-09-15 | Yes |
| 509-515 | SUNNYSIDE | 792K | 2007-04-26 | Yes |
| 509-516 | WALLAWALLA | 6529 | 2021-02-16 | Yes |
| 509-517 | YAKIMA | 6529 | 2021-01-11 | Yes |
| 509-518 | KENNEWICK | 624H | — | Yes |
| 509-519 | MATTAWA | 3229 | 2020-08-17 | Yes |
| 509-520 | WALLAWALLA | 5812 | — | — |
| 509-521 | PASCO | 6010 | — | — |
| 509-522 | WALLAWALLA | 9638 | — | — |
| 509-523 | ROSALIA | 4324 | — | Yes |
| 509-524 | WALLAWALLA | 9638 | — | Yes |
| 509-525 | WALLAWALLA | 9638 | — | — |
| 509-526 | WALLAWALLA | 9638 | — | — |
| 509-527 | WALLAWALLA | 9638 | — | — |
| 509-528 | PASCO | 6010 | — | — |
| 509-529 | WALLAWALLA | 9638 | — | — |
| 509-530 | SPOKANE | 508J | 2018-11-06 | Yes |
| 509-531 | PASCO | 6010 | — | — |
| 509-532 | SPOKANE | 9638 | — | — |
| 509-533 | SPOKANE | 9638 | — | — |
| 509-534 | SPOKANE | 9638 | — | — |
| 509-535 | SPOKANE | 9638 | — | — |
| 509-536 | SPOKANE | 9638 | — | — |
| 509-537 | PASCO | 483E | 2001-12-11 | Yes |
| 509-538 | WILLARD | 4521 | — | Yes |
| 509-539 | PASCO | 6010 | — | — |
| 509-540 | WALLAWALLA | 5812 | — | Yes |
| 509-541 | SPOKANE | 6010 | 2025-01-07 | Yes |
| 509-542 | PASCO | 9638 | — | Yes |
| 509-543 | PASCO | 9638 | — | — |
| 509-544 | PASCO | 9638 | — | — |
| 509-545 | PASCO | 9638 | — | — |
| 509-546 | PASCO | 9638 | — | Yes |
| 509-547 | PASCO | 9638 | — | — |
| 509-548 | WENATCHEE | 4324 | — | — |
| 509-549 | LACROSSE | 2437 | — | Yes |
| 509-550 | NEWPORT | 6529 | — | Yes |
| 509-551 | KENNEWICK | 6010 | 2002-07-23 | Yes |
| 509-552 | CLARKSTON | 6529 | — | Yes |
| 509-553 | COLFAX | 6529 | — | Yes |
| 509-554 | RICHLAND | 6010 | 2002-07-23 | Yes |
| 509-555 | DIR ASST | MULT | — | — |
| 509-556 | MT HULL | 581D | 2001-01-26 | — |
| 509-557 | OMAK | 6121 | 2002-04-04 | Yes |
| 509-558 | SPOKANE | 7173 | 2016-08-01 | Yes |
| 509-559 | CHENEY | 2408 | — | Yes |
| 509-560 | OROVILLE | 6010 | 2002-04-04 | Yes |
| 509-561 | SPOKANE | 483E | — | — |
| 509-562 | SPOKANE | 483E | — | — |
| 509-563 | COLVILLE | 6121 | 2002-04-04 | Yes |
| 509-564 | DEER PARK | 5812 | 2022-02-16 | Yes |
| 509-565 | MEDICAL LK | 7455 | — | Yes |
| 509-566 | POMEROY | 6121 | 2002-04-04 | Yes |
| 509-567 | PASCO | 792K | 2013-09-13 | Yes |
| 509-568 | SPOKANE | 9638 | — | — |
| 509-569 | ROSALIA | 4324 | — | Yes |
| 509-570 | SPOKANE | 829J | 2001-07-30 | Yes |
| 509-571 | YAKIMA | 5812 | 2013-12-18 | Yes |
| 509-572 | KENNEWICK | 5812 | — | Yes |
| 509-573 | YAKIMA | 9638 | — | — |
| 509-574 | YAKIMA | 9638 | — | — |
| 509-575 | YAKIMA | 9638 | — | — |
| 509-576 | YAKIMA | 9638 | — | — |
| 509-577 | YAKIMA | 9638 | — | — |
| 509-578 | RICHLAND | 7173 | 2013-05-02 | Yes |
| 509-579 | KENNEWICK | 508J | — | Yes |
| 509-580 | SELAH | 6010 | 2008-02-25 | Yes |
| 509-581 | KENNEWICK | 483E | 2001-12-11 | Yes |
| 509-582 | KENNEWICK | 4324 | — | — |
| 509-584 | WAPATO | 792K | 2007-05-10 | Yes |
| 509-585 | KENNEWICK | 4324 | — | — |
| 509-586 | KENNEWICK | 427K | — | — |
| 509-587 | BREWSTER | 6121 | 2002-03-14 | Yes |
| 509-588 | BENTONCITY | 4324 | — | Yes |
| 509-589 | NEWPORT | 6010 | 2002-08-05 | Yes |
| 509-590 | SPOKANE | 6121 | 2002-05-07 | Yes |
| 509-591 | KENNEWICK | 6121 | 2002-05-07 | Yes |
| 509-592 | PULLMAN | 622J | — | Yes |
| 509-593 | WALLAWALLA | 6121 | 2002-05-07 | Yes |
| 509-594 | YAKIMA | 6121 | 2002-05-07 | Yes |
| 509-595 | PULLMAN | 5812 | — | Yes |
| 509-596 | CLARKSTON | 6529 | 2016-03-23 | Yes |
| 509-597 | UNIONTOWN | 1484 | — | Yes |
| 509-598 | SPOKANE | 7173 | 2014-12-01 | Yes |
| 509-599 | SPOKANE | 5562 | — | Yes |
| 509-600 | BRIDGEPORT | 483E | 2015-09-16 | 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.