Washington has 6 active area codes as of 2026, covering the state through a mix of original 1947 assignments, geographic splits, and modern overlays. This guide walks through the full list, which regions each code serves, the order they came online, and where new codes are most likely to land next.
The Short Answer
Washington currently has 6 active area codes in service. The count reflects a combination of population growth, the rise of mobile lines, and the way modern numbering allocates blocks — every line activated, whether a cellphone, a business desk line, a VoIP number, or a connected device, consumes a slot in the pool.
By population, Washington ranks #13 nationally with roughly 7,958,180 residents as of the most recent estimates. That puts the state’s area code count in line with its population peers — denser, faster-growing states need more codes; smaller states need fewer.
The Full List of Washington Area Codes
The active area codes serving Washington are listed below, in numerical order. Where a code is an overlay or a split-off from an earlier code, that relationship is noted.
- 206 — Seattle and closest suburbs (Shoreline, Mercer Island, Bainbridge Island, Vashon Island)
- 253 — Southern Puget Sound (Tacoma, most of Pierce County, Auburn)
- 360 — Western Washington outside the Seattle metro (Olympia, Bellingham, Vancouver, Olympic Peninsula)
- 425 — Seattle's Eastside and southern Snohomish County (Bellevue, Redmond, Everett)
- 509 — Eastern Washington (Spokane, Tri-Cities, Yakima, Walla Walla)
- 564 — Western Washington (overlays the 360 and 206 regions) (overlay of 360 and 206)
How Washington’s Area Codes Grew Over Time
Washington received its first area code, 206, when the North American Numbering Plan launched in 1947. That single code initially covered the entire state, and subsequent splits and overlays narrowed it over the decades that followed.
Ready to Get a Washington Number?
One-time fee. No monthly charges. Port to any carrier in 3–5 business days. NYC's most trusted source since 2009.
Browse Washington Area Codes →- 1947 — 206 assigned as Washington's sole area code at the launch of the North American Numbering Plan, covering the entire state.
- 1957 — 509 split off from 206 to serve Eastern Washington, with the boundary roughly following the Cascade Range.
- 1995 — 360 split off from 206 for most of Western Washington outside the Seattle and Tacoma areas, leaving 206 for the Puget Sound core.
- 1997 — 425 and 253 split off from 206 in a three-way division: 425 for the Eastside and southern Snohomish County, 253 for the Tacoma area, leaving 206 for Seattle and its closest neighbors.
- 2017 — 564 activated on August 1 as an overlay of 360, the first phase of a planned relief code for all of Western Washington. Ten-digit dialing became mandatory across Western Washington on July 29, 2017.
- 2025 — 564 expanded on June 10 to also overlay the 206 region, adding new numbers in Seattle once the 206 pool neared exhaustion.
Why Washington Has Multiple Area Codes
A single area code can hold roughly 7.9 million possible phone numbers in theory — 792 valid central office codes (the second three digits) multiplied by 10,000 line numbers each. In practice the usable count is lower, because blocks of numbers are reserved, withheld, or assigned in bulk to carriers that may never fully use them. When the pool of available numbers in an area code falls below the threshold the North American Numbering Plan Administrator (NANPA) tracks, the state requests relief, and either a split or an overlay is approved.
Washington’s population of roughly 7,958,180 residents would, on its own, fit comfortably inside a single area code’s capacity. The reason 6 codes are needed instead is that every adult typically carries at least one mobile line, many households have multiple lines per person, businesses concentrate phone numbers at extreme density, and connected devices, VoIP services, and second-line apps all draw from the same pool. The math compounds quickly.
Washington Area Codes by Region
Seattle core (206, 564): Seattle and its closest suburbs, plus Mercer, Bainbridge, and Vashon islands. 206 is the original 1947 code; 564 was added as an overlay of this region on June 10, 2025.
Seattle Eastside and northern suburbs (425): Bellevue, Redmond, Everett, and the Eastside east to North Bend, plus southern Snohomish County. Split off from 206 in 1997.
Southern Puget Sound (253): Tacoma, most of Pierce County, and Auburn. Split off from 206 in 1997.
Western Washington outside the Seattle metro (360, 564): Olympia, Bellingham, Vancouver, and the Olympic Peninsula. 360 split off from 206 in 1995; 564 overlay added in 2017.
Eastern Washington (509): Spokane, the Tri-Cities, Yakima, and Walla Walla, covering the state east of the Cascades. Split off from 206 in 1957.
What’s Next for Washington Area Codes
Washington’s relief strategy centers on 564, a single overlay code introduced for all of Western Washington and rolled out in phases as each underlying area code nears exhaustion. It first overlaid 360 in 2017 and expanded to the 206 region on June 10, 2025, with the 253 and 425 areas slated for the same overlay when their number pools run low. Eastern Washington’s 509 remains a standalone code with no overlay yet assigned. Because the 564 framework was designed to absorb growth across the western part of the state, no Washington numbering plan area appears on NANPA’s near-term relief schedule.
Frequently Asked Questions
How many area codes does Washington have right now?
Washington has 6 active area codes in service across the territory it covers, including any overlays that share geography with an older code.
What is the oldest area code in Washington?
206 is the oldest active area code in Washington, assigned in 1947 when the North American Numbering Plan launched. It remains in service today, though its geographic footprint has typically been reduced by subsequent splits and overlays.
What is the newest area code in Washington?
The most recent area code addition to Washington was 564, activated in 2025. New phone lines provisioned in its service area are increasingly drawn from this code as older overlays approach exhaustion.
Why does Washington need so many area codes?
Population growth combined with the proliferation of mobile lines, business direct-dial numbers, VoIP services, and connected devices has exhausted older codes faster than the original 1947 plan anticipated. Each new area code adds roughly 7.9 million additional phone numbers to the regional pool.
How many area codes does Washington have?
Washington has six area codes as of 2026: 206, 253, 360, 425, 509, and 564. Five of them serve distinct regions, while 564 is an overlay that shares territory with the 360 and 206 areas in Western Washington.
What area code is Seattle?
Seattle’s primary area code is 206, the original code assigned to all of Washington in 1947. Since June 10, 2025, the 564 overlay also covers the same Seattle territory, so new lines in the city may be assigned a 564 number.
What is the 564 area code?
564 is an overlay code for Western Washington rather than a single-city code. It was introduced in 2017 to add numbers in the 360 region and expanded in 2025 to also cover the 206 region, with the 253 and 425 areas planned for later phases. Numbers in 564 require 10-digit dialing, the same as elsewhere in Western Washington.
What area code is Spokane?
Spokane uses 509, which covers all of Eastern Washington including the Tri-Cities, Yakima, and Walla Walla. 509 split off from 206 in 1957 and remains the only area code east of the Cascades.
Why does Tacoma have a different area code than Seattle?
Tacoma uses 253, which split off from 206 in 1997 along with 425. Before that split, Seattle and Tacoma shared 206, but rapid growth in the Puget Sound region required dividing the territory into separate area codes.
Ready to Get a Number in Washington?
We carry available Washington numbers right now across multiple area codes. Order directly in 206, 253, 360, 425, or 509 — a one-time fee, no monthly charges, with pricing From $150 depending on the digit pattern and memorability of the number. Prefer help choosing? Call us at (212) 580-2000.
