The area code 564 is located in Seattle, Washington.
Area code 564 serves western Washington and now includes the greater Seattle area as part of a regional overlay. Seattle sits on Puget Sound with views of the Olympic and Cascade ranges, and its busy tech, port, and cultural scenes drive strong demand for new phone numbers. In 2017, 564 launched as an overlay to 360; in 2023, state regulators approved expanding 564 across the 206, 253, and 425 regions so new lines in and around Seattle can use 564 when needed. Ten-digit dialing is standard across the region, and existing numbers keep their original area codes.
“Area code 564 will be overlaid on the 206, 253, and 425 area codes.” — Washington Utilities and Transportation Commission (2023)
This overlay ties into a longer history of Seattle phone codes. The 206 area code dates to 1947 and once covered most of western Washington before splits created 360 (1995) and 425/253 (1997). With 564, Seattle and the Puget Sound share a unified solution that adds capacity without changing anyone’s current number. This makes it easier to add mobile lines, VoIP services, and business phone systems while keeping the region’s familiar dialing patterns.
Major cities and communities in the 564 overlay footprint that touch the Seattle metro and Puget Sound include:
Expect to see new 564 phone numbers appear across Seattle and nearby cities as demand grows. Key landmarks within this calling area include the Space Needle, Pike Place Market, the University of Washington, and many waterfront neighborhoods along Puget Sound. For callers, the rule is simple: use the full 10-digit number (area code + phone number) for all local and long-distance calls within western Washington.