UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA
29 prefixes in 509 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 509-364 | GLENWOOD | 4521 | — | Yes |
| 509-365 | LYLE | 4521 | — | Yes |
| 509-369 | KLICKITAT | 4521 | — | Yes |
| 509-377 | COLUMBIA | 4521 | — | Yes |
| 509-384 | ROOSEVELT | 4521 | — | Yes |
| 509-395 | TROUT LAKE | 4521 | — | Yes |
| 509-427 | STEVENSON | 4521 | — | Yes |
| 509-493 | WH SALMON | 4521 | — | Yes |
| 509-538 | WILLARD | 4521 | — | Yes |
| 509-748 | DALLESPORT | 4521 | — | Yes |
| 509-767 | DALLESPORT | 4521 | — | Yes |
| 509-773 | GOLDENDALE | 4521 | — | Yes |
| 509-786 | PROSSER | 4521 | — | — |
| 509-788 | PROSSER | 4521 | — | Yes |
| 509-829 | TOPPENISH | 4521 | — | Yes |
| 509-836 | SUNNYSIDE | 4521 | — | Yes |
| 509-837 | SUNNYSIDE | 4521 | — | — |
| 509-839 | SUNNYSIDE | 4521 | — | — |
| 509-848 | HARRAH | 4521 | — | Yes |
| 509-854 | GRANGER | 4521 | — | Yes |
| 509-865 | TOPPENISH | 4521 | — | — |
| 509-874 | WHITE SWAN | 4521 | — | Yes |
| 509-875 | PATERSON | 4521 | — | Yes |
| 509-877 | WAPATO | 4521 | — | Yes |
| 509-882 | GRANDVIEW | 4521 | — | — |
| 509-894 | MABTON | 4521 | — | Yes |
| 509-896 | MABTON | 4521 | — | Yes |
| 509-932 | MATTAWA | 4521 | — | Yes |
| 509-973 | WHITSTRAN | 4521 | — | 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.