All assignees
778 prefixes in 509 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 509-300 | WENATCHEE | 483E | — | Yes |
| 509-301 | WALLAWALLA | 5562 | — | Yes |
| 509-302 | PASCO | 5562 | — | Yes |
| 509-303 | PROSSER | 6529 | — | Yes |
| 509-304 | CLE ELUM | 6529 | — | Yes |
| 509-305 | SUNNYSIDE | 6529 | — | Yes |
| 509-306 | ELLENSBURG | 5562 | — | Yes |
| 509-307 | YAKIMA | 6529 | — | Yes |
| 509-308 | KENNEWICK | 6529 | — | Yes |
| 509-309 | SPOKANE | 483E | 2014-03-05 | Yes |
| 509-310 | WH SALMON | 6529 | — | Yes |
| 509-311 | XXXXXXXXXX | MULT | — | — |
| 509-312 | ELLENSBURG | 6529 | 2001-07-11 | Yes |
| 509-313 | SPOKANE | 9638 | 2008-03-27 | Yes |
| 509-314 | TOPPENISH | 5812 | — | Yes |
| 509-315 | SPOKANE | 663D | 2007-04-03 | Yes |
| 509-316 | PASCO | 006F | 2014-10-30 | Yes |
| 509-317 | YAKIMA | 508J | 2014-10-31 | Yes |
| 509-318 | CONNELL | 6010 | 2003-06-19 | Yes |
| 509-319 | SPOKANE | 159F | 2014-11-30 | Yes |
| 509-320 | STARBUCK | 6121 | 2004-06-14 | Yes |
| 509-321 | SPOKANE | 7173 | — | Yes |
| 509-322 | OMAK | 6010 | — | Yes |
| 509-323 | SPOKANE | 9638 | — | — |
| 509-324 | SPOKANE | 9638 | — | — |
| 509-325 | SPOKANE | 9638 | — | — |
| 509-326 | SPOKANE | 9638 | — | — |
| 509-327 | SPOKANE | 9638 | — | — |
| 509-328 | SPOKANE | 9638 | — | — |
| 509-329 | SPOKANE | 9638 | — | Yes |
| 509-330 | PULLMAN | 1484 | 2002-05-16 | Yes |
| 509-331 | OTHELLO | 9638 | — | Yes |
| 509-332 | PULLMAN | 4324 | — | Yes |
| 509-333 | PULLMAN | 4324 | — | — |
| 509-334 | PULLMAN | 4324 | — | — |
| 509-335 | PULLMAN | 4324 | — | — |
| 509-336 | PULLMAN | 4324 | — | Yes |
| 509-337 | WAITSBURG | 9638 | — | Yes |
| 509-338 | PULLMAN | 4324 | — | Yes |
| 509-339 | PULLMAN | 4324 | — | Yes |
| 509-340 | SPOKANE | 7229 | — | Yes |
| 509-341 | TWISP | 6010 | — | Yes |
| 509-342 | SPOKANE | 6529 | — | Yes |
| 509-343 | SPOKANE | 7229 | — | — |
| 509-344 | SPOKANE | 7229 | — | Yes |
| 509-345 | WILSON CRK | 2408 | — | Yes |
| 509-346 | OTHELLO | 2408 | — | Yes |
| 509-347 | RITZVILLE | 6010 | 2002-09-24 | Yes |
| 509-348 | DAVENPORT | 1477 | 2002-09-24 | Yes |
| 509-349 | WARDEN | 9638 | — | Yes |
| 509-350 | MOSES LAKE | 5562 | — | Yes |
| 509-351 | SPOKANE | 483E | — | — |
| 509-352 | SPOKANE | 483E | — | — |
| 509-353 | SPOKANE | 9638 | — | — |
| 509-354 | SPOKANE | 9638 | — | — |
| 509-355 | SPOKANE | 483E | — | — |
| 509-356 | SPOKANE | 483E | — | — |
| 509-357 | SPOKANE | 483E | — | — |
| 509-358 | SPOKANE | 9638 | — | — |
| 509-359 | CHENEY | 2408 | — | Yes |
| 509-360 | WALLAWALLA | 427K | 2023-03-17 | Yes |
| 509-361 | MOSES LAKE | 6529 | — | Yes |
| 509-362 | SPOKANE | 6010 | 2001-12-05 | Yes |
| 509-363 | SPOKANE | 9638 | — | — |
| 509-364 | GLENWOOD | 4521 | — | Yes |
| 509-365 | LYLE | 4521 | — | Yes |
| 509-366 | KENNEWICK | 6270 | — | Yes |
| 509-367 | YAKIMA | 5562 | 2014-07-03 | Yes |
| 509-368 | SPOKANE | 9638 | — | Yes |
| 509-369 | KLICKITAT | 4521 | — | Yes |
| 509-370 | SPOKANE | 6529 | — | Yes |
| 509-371 | RICHLAND | 4324 | — | Yes |
| 509-372 | RICHLAND | 4324 | — | — |
| 509-373 | RICHLAND | 4324 | — | — |
| 509-374 | KENNEWICK | 4324 | — | Yes |
| 509-375 | RICHLAND | 4324 | — | — |
| 509-376 | RICHLAND | 4324 | — | — |
| 509-377 | COLUMBIA | 4521 | — | Yes |
| 509-378 | KENNEWICK | 5812 | — | Yes |
| 509-379 | YAKIMA | 5812 | 2012-12-17 | Yes |
| 509-380 | PASCO | 792K | 2007-03-05 | Yes |
| 509-381 | SPOKANE | 483E | — | Yes |
| 509-382 | DAYTON | 9638 | — | Yes |
| 509-383 | GRANGER | 6121 | 2002-10-18 | Yes |
| 509-384 | ROOSEVELT | 4521 | — | Yes |
| 509-385 | SPOKANE | 483E | 2006-03-09 | Yes |
| 509-386 | WALLAWALLA | 5812 | — | — |
| 509-387 | WENATCHEE | 6529 | 2003-06-18 | Yes |
| 509-388 | YAKIMA | 6121 | — | Yes |
| 509-389 | SPOKANE | 6010 | — | Yes |
| 509-390 | SOAP LAKE | 663D | 2001-10-29 | Yes |
| 509-391 | SUNNYSIDE | 6529 | — | Yes |
| 509-392 | RICHLAND | 6121 | — | Yes |
| 509-393 | WENATCHEE | 6010 | — | Yes |
| 509-394 | TOUCHET | 9638 | — | Yes |
| 509-395 | TROUT LAKE | 4521 | — | Yes |
| 509-396 | KENNEWICK | 6121 | — | Yes |
| 509-397 | COLFAX | 9638 | — | Yes |
| 509-398 | EPHRATA | 6010 | 2002-04-04 | Yes |
| 509-399 | STARBUCK | 2408 | — | 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.