Washington · Pacific Time
564 Area Code
Area code 564 is in Washington, serving western Washington, overlaying both 206 (Seattle) and 360 (outside the Puget Sound core). It is in the Pacific Time zone. It shares its territory with overlay codes 206 and 360, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 564 area code?
564 is a Washington area code covering western Washington, overlaying both 206 (Seattle) and 360 (outside the Puget Sound core). In the wider directory it sits in the West region.
Cities in the 564 area code
- Seattle
- Shoreline
- Burien
- SeaTac
- Tukwila
- Mercer Island
- Lake Forest Park
- Bainbridge Island
- Normandy Park
- Vancouver
- Bellingham
- Olympia
- Marysville
- Bremerton
Counties served by 564
King County, Kitsap County, Clark County, Whatcom County, Thurston County, Skagit County, Cowlitz County, Clallam County, Grays Harbor County and Lewis County.
564 overlay codes and dialing
The 564 territory is covered by an overlay of 3 area codes: 206, 360, 564. All of them serve the same geographic area, and the original code is 206. Because more than one code covers the same ground, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes.
History of the 564 area code
564 went into service on August 28, 2017 as an overlay of 360, relieving number exhaustion in the Seattle area. Rather than splitting the region, the overlay lets existing customers keep their numbers while new lines draw from the added code. Learn more in our overlay guide.
Is 564 a scam or spam risk?
564 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 564 number on your screen is no guarantee the caller is in Seattle, WA or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Explore more
See every code in Washington, compare codes across the West region, or view all Pacific Time codes. You can also browse the 5XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
564 area code FAQ
Where is the 564 area code?
The 564 area code is in Washington, covering western Washington, overlaying both 206 (Seattle) and 360 (outside the Puget Sound core), in the West region.
What cities are in the 564 area code?
Cities in the 564 area code include Seattle, Shoreline, Burien, SeaTac, Tukwila, Mercer Island, Lake Forest Park, Bainbridge Island, Normandy Park and Vancouver.
What time zone is 564 in?
564 is in the Pacific Time zone.
What is the overlay for the 564 area code?
564 shares its territory with 206 and 360. All 3 codes (206, 360, 564) serve the same area, so 10-digit dialing is required for every call.
When did the 564 area code start?
564 went into service on August 28, 2017 as an overlay of 360.
Do I have to dial 10 digits for 564?
Yes. Because 564 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 564 a toll-free or premium code?
No. 564 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.