List of Washington (state) area codes

The U.S. state of Washington has six telephone area codes serving five distinct numbering plan areas. The state initially used a single area code (206) 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. In 1997, area code 425 was assigned to Seattle's Eastside and South Snohomish County suburbs and area code 253 for the Tacoma area, leaving 206 for just the city of Seattle, closely neighboring cities in King and Snohomish counties, and Bainbridge Island in Kitsap County.

Area codes in Washington

Code	Created	Regions and cities	Description
206	January 1, 1947	Seattle, Shoreline, Lake Forest Park, Mercer Island, Bainbridge Island, Vashon Island	Original statewide area code until 1957, when area code 509 was created for Eastern Washington. Further splits in 1995 to create area code 360 for most of Western Washington, and 1997 to form area codes 253 and 425. 564 will be added to the 206 area in 2025.
509	January 1, 1957[1]	Eastern Washington, including Spokane, the Tri-Cities, Yakima, Walla Walla, and Wenatchee	Created in a split from area code 206.[2]
360	January 15, 1995[3]	Western Washington excluding most of the Seattle metropolitan area; includes Olympia, Kitsap County, Bellingham, and Vancouver	Overlay plan. NPAs 206, 253, and 425 are slated for inclusion in overlay.[4]
564	August 28, 2017[4]
253	April 27, 1997[5]	Southern Puget Sound region, including Tacoma, most of Pierce County, Auburn, and Federal Way
425	April 27, 1997[5]	Eastside and southern Snohomish County, including Everett, Snoqualmie Pass, and Renton[4]

Area codes in Washington state

See also

• United States portal

• List of North American Numbering Plan area codes