| District of Washington area codes: 509 | |
|---|---|
| Country | United States |
| State/Province | Washington |
| Major City | Spokane |
| Time Zone | Pacific (UTC-08:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 509-396 | Benton | Kennewick, WA | Level 3 Communications |
| 509-397 | Whitman | Colfax, WA | Qwest Corporation |
| 509-398 | Grant | Ephrata, WA | New Cingular Wireless PCS |
| 509-399 | Whitman | Hay, WA | Centurytel Of Washington DBA Centurylink |
| 509-406 | Yakima | Yakima, WA | Cellco Partnership DBA Verizon Wireless |
| 509-412 | Franklin | Pasco, WA | Sprint Spectrum L.p. |
| 509-413 | Spokane | Spokane, WA | Neutral Tandem-washington |
| 509-414 | Spokane | Chattaroy, WA | Comcast Phone Of Washington/oregon |
| 509-415 | Chelan | Wenatchee, WA | Sprint Spectrum L.p. |
| 509-416 | Franklin | Pasco, WA | Level 3 Communications |
| 509-420 | Benton | Richland, WA | AT&T Local |
| 509-421 | Chelan | Wenatchee, WA | New Cingular Wireless PCS |
| 509-422 | Okanogan | Omak, WA | Qwest Corporation |
| 509-423 | Chelan | Wenatchee, WA | Cellco Partnership DBA Verizon Wireless |
| 509-424 | Yakima | Yakima, WA | Sprint Spectrum L.p. |
| 509-426 | Yakima | Yakima, WA | Teleport Communications America |
| 509-427 | Skamania | Stevenson, WA | United Telephone-northwest-wa DBA Centurylink-wa |
| 509-428 | Adams | Ritzville, WA | Sprint Spectrum L.p. |
| 509-429 | Okanogan | Omak, WA | Cellco Partnership DBA Verizon Wireless |
| 509-430 | Franklin | Pasco, WA | New Cingular Wireless PCS |
There are 634 prefixes, In the code area, the major cities are Kennewick, WA;Opportunity, WA;Pasco, WA;Pullman, W. The major city is Spokane.