| 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 |
|---|---|---|---|
| 509-376 | Benton | Richland, WA | Frontier Communications Northwest Inc. |
| 509-377 | Franklin | Mesa, WA | United Telephone-northwest-wa DBA Centurylink-wa |
| 509-378 | Benton | Kennewick, WA | Cellco Partnership DBA Verizon Wireless |
| 509-379 | Yakima | Yakima, WA | Cellco Partnership DBA Verizon Wireless |
| 509-380 | Franklin | Pasco, WA | Charter Fiberlink Wa-ccvii |
| 509-381 | Spokane | Spokane, WA | 360networks (usa) Inc. |
| 509-382 | Columbia | Dayton, WA | Qwest Corporation |
| 509-383 | Yakima | Granger, WA | Level 3 Communications |
| 509-384 | Klickitat | Roosevelt, WA | United Telephone-northwest-wa DBA Centurylink-wa |
| 509-385 | Spokane | Spokane, WA | 360networks (usa) Inc. |
| 509-386 | Walla Walla | Walla Walla, WA | Cellco Partnership DBA Verizon Wireless |
| 509-387 | Chelan | Wenatchee, WA | Sprint Spectrum L.p. |
| 509-388 | Yakima | Yakima, WA | Level 3 Communications |
| 509-389 | Spokane | Spokane, WA | New Cingular Wireless PCS |
| 509-390 | Grant | Soap Lake, WA | Eltopia Communications |
| 509-391 | Yakima | Sunnyside, WA | Sprint Spectrum L.p. |
| 509-392 | Benton | Kennewick, WA | Level 3 Communications |
| 509-393 | Chelan | Wenatchee, WA | New Cingular Wireless PCS |
| 509-394 | Walla Walla | Touchet, WA | Qwest Corporation |
| 509-395 | Klickitat | Trout Lake, WA | United Telephone-northwest-wa DBA Centurylink-wa |
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.