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The state initially used a single area code until it was divided in 1957 with the creation of area code 509 to serve Eastern Washington. In 1995, 206 was split again to serve just the Puget Sound region after area code 360 was created for the remainder of Western Washington .
Area code 509 is the telephone area code in the North American Numbering Plan (NANP) for the eastern part of the U.S. state of Washington. The numbering plan area (NPA) roughly comprises the state east of the Cascade Mountains, and includes Spokane, the Tri-Cities (Richland, Pasco, and Kennewick), Ellensburg, Yakima, Walla Walla, and Wenatchee ...
List of Washington area codes may refer to: List of Washington (state) area codes; List of Washington, D.C., area codes This page was last edited on 23 ...
List of Washington (state) area codes; 0–9. Area code 206; Area code 253; Area code 360; Area code 425; Area code 509; Area code 564
Map of Washington's area codes. The red-highlighted area has area code 425. Area code 425 is a telephone area code in the North American Numbering Plan (NANP) for the suburbs north and east of Seattle in the U.S. state of Washington. The numbering plan area includes the Eastside, extending east to North Bend, north to Everett, and south to ...
Area code 206 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Washington. The numbering plan area (NPA) includes Seattle and most of its innermost suburbs. This includes such suburbs as Shoreline and Lake Forest Park ; Mercer , Bainbridge , and Vashon Islands; and portions of metropolitan Seattle from ...
Map of Washington's area codes. Area 253 is shown in red. Area code 253 is a telephone area code in the North American Numbering Plan (NANP) for a part of the U.S. state of Washington. The numbering plan area (NPA) includes cities in King County that are situated south of Seattle and the southern Puget Sound area, centered at Tacoma and ...
From 1947 to 1957, all of Washington state was assigned area code 206 for routing long-distance telephone calls in Operator Toll Dialing. In 1957, the numbering plan area (NPA) was reduced to just the western part of the state, with most of the state east of the Cascade Mountains becoming area code 509. Washington remained with two NPAs for 38 ...