Washington number prefixes
- Alderton
- Algona
- Anderson Island
- Artondale
- Auburn
- Bonney Lake
- Browns Point
- Burley
- Canterwood
- Clover Creek
- Covington
- Dash Point
- DuPont
- East Hill-Meridian
- Edgewood
- Elk Plain
- Federal Way
- Fife
- Fife Heights
- Fircrest
- Fort Lewis
- Fox Island
- Frederickson
- Gig Harbor
- Graham
- Herron Island
- Home
- Kent
- Ketron Island
- Key Center
- Lake Holm
- Lakeland North
- Lakeland South
- Lake Morton-Berrydale
- Lake Tapps
- Lakewood
- Longbranch
- McChord AFB
- McKenna
- McMillin
- Maplewood
- Midland
- Milton
- North Fort Lewis
- North Puyallup
- Pacific
- Parkland
- Prairie Heights
- Prairie Ridge
- Purdy
- Puyallup
- Raft Island
- Rosedale
- Roy
- Ruston
- South Creek
- South Hill
- Spanaway
- Stansberry Lake
- Steilacoom
- Summit
- Summit View
- Sumner
- Tacoma
- University Place
- Vaughn
- Waller
- Wauna
- Wollochet
- Aberdeen
- Aberdeen Gardens
- Acme
- Alder
- Alger
- Allyn
- Altoona
- Amanda Park
- Amboy
- Anacortes
- Arlington
- Arlington Heights
- Ashford
- Bangor Base
- Barberton
- Baring
- Battle Ground
- Bay Center
- Bay View
- Belfair
- Bell Hill
- Bellingham
- Bethel
- Big Lake
- Birch Bay
- Black Diamond
- Blaine
- Blyn
- Brady
- Bremerton
- Brinnon
- Brush Prairie
- Bryant
- Buckley
- Bucoda
- Burley
- Burlington
- Camas
- Canyon Creek
- Carbonado
- Carlsborg
- Castle Rock
- Cathcart
- Cathlamet
- Centralia
- Central Park
- Chain Lake
- Chehalis
- Cherry Grove
- Chico
- Chinook
- Clallam Bay
- Clear Lake
- Clear Lake
- Clearview
- Clinton
- Cohassett Beach
- Concrete
- Conway
- Copalis Beach
- Cosmopolis
- Coupeville
- Crocker
- Custer
- Darrington
- Deep River
- Deming
- Dollars Corner
- Duluth
- East Cathlamet
- East Port Orchard
- Eatonville
- Edison
- Elbe
- Elma
- Enetai
- Enumclaw
- Erlands Point-Kitsap Lake
- Everson
- Felida
- Ferndale
- Fern Prairie
- Five Corners
- Fobes Hill
- Fords Prairie
- Forks
- Freeland
- Friday Harbor
- Geneva
- Glacier
- Gold Bar
- Gorst
- Graham
- Grand Mound
- Granite Falls
- Grapeview
- Grayland
- Grays River
- Greenwater
- Hamilton
- Hansville
- Hazel Dell
- High Bridge
- Hockinson
- Hogans Corner
- Hoodsport
- Hoquiam
- Humptulips
- Ilwaco
- Index
- Indianola
- Jamestown
- Junction City
- Kalama
- Kapowsin
- Kelso
- Kendall
- Keyport
- Kingston
- La Center
- Lacey
- La Conner
- La Grande
- Lake Bosworth
- Lake Cassidy
- Lake Cavanaugh
- Lake Ketchum
- Lake McMurray
- Lake Roesiger
- Lake Shore
- Langley
- Lebam
- Lewisville
- Lochsloy
- Lofall
- Long Beach
- Longview
- Longview Heights
- Lower Elochoman
- Lyman
- Lynden
- McCleary
- McKenna
- McMillin
- Malone
- Maltby
- Manchester
- Maple Falls
- Marblemount
- Marietta-Alderwood
- Markham
- Marrowstone
- Marysville
- May Creek
- Meadow Glade
- Mineral
- Minnehaha
- Moclips
- Monroe
- Monroe North
- Montesano
- Morton
- Mossyrock
- Mount Vernon
- Mount Vista
- Napavine
- Naselle
- Navy Yard City
- Neah Bay
- Neilton
- Nisqually Indian Community
- Nooksack
- North Marysville
- North Sultan
- Northwest Stanwood
- North Yelm
- Oak Harbor
- Oakville
- Ocean City
- Ocean Park
- Ocean Shores
- Olympia
- Onalaska
- Orchards
- Orting
- Oso
- Oyehut
- Pacific Beach
- Packwood
- Parkwood
- Peaceful Valley
- Pe Ell
- Point Roberts
- Port Angeles
- Port Angeles East
- Porter
- Port Gamble Tribal Comunity
- Port Hadlock-Irondale
- Port Ludlow
- Port Orchard
- Port Townsend
- Poulsbo
- Prairie Heights
- Prairie Ridge
- Puget Island
- Queets
- Quilcene
- Qui-nai-elt Village
- Rainier
- Ravensdale
- Raymond
- Ridgefield
- River Road
- Rochester
- Rockport
- Rocky Point
- Rosburg
- Ryderwood
- Salmon Creek
- Santiago
- Satsop
- Seabeck
- Sedro-Woolley
- Sekiu
- Sequim
- Shelton
- Silvana
- Silverdale
- Sisco Heights
- Skamokawa Valley
- Skokomish
- Skykomish
- Snohomish
- South Bend
- South Prairie
- Southworth
- Stanwood
- Startup
- Sudden Valley
- Sultan
- Sumas
- Sunday Lake
- Suquamish
- Swede Heaven
- Taholah
- Tanglewilde
- Tenino
- Three Lakes
- Tokeland
- Toledo
- Tracyton
- Tumwater
- Union
- Upper Elochoman
- Vader
- Vancouver
- Venersborg
- Verlot
- Walnut Grove
- Warm Beach
- Washougal
- Westport
- West Side Highway
- Whidbey Island Station
- Wilkeson
- Willapa
- Winlock
- Woodland
- Woods Creek
- Yacolt
- Yelm
- Alderwood Manor
- Ames Lake
- Beaux Arts Village
- Bellevue
- Bothell
- Bothell East
- Bothell West
- Brier
- Bunk Foss
- Carnation
- Cavalero
- Clearview
- Clyde Hill
- Cottage Lake
- Duvall
- Eastgate
- Eastmont
- East Renton Highlands
- Edmonds
- Esperance
- Everett
- Fairwood
- Fall City
- Fobes Hill
- Hat Island
- Hobart
- Hunts Point
- Inglewood-Finn Hill
- Issaquah
- Kenmore
- Kingsgate
- Kirkland
- Klahanie
- Lake Cassidy
- Lake Marcel-Stillwater
- Lake Stevens
- Lake Stickney
- Larch Way
- Lochsloy
- Lynnwood
- Machias
- Maltby
- Maple Heights-Lake Desire
- Maple Valley
- Martha Lake
- Meadowdale
- Medina
- Mill Creek
- Mill Creek East
- Mirrormont
- Mountlake Terrace
- Mukilteo
- Newcastle
- North Bend
- North Lynnwood
- Picnic Point
- Ravensdale
- Redmond
- Renton
- Riverbend
- Sammamish
- Shadow Lake
- Silver Firs
- Snoqualmie
- Tanner
- Union Hill-Novelty Hill
- Wilderness Rim
- Woodinville
- Woodway
- Yarrow Point
- Addy
- Ahtanum
- Airway Heights
- Albion
- Almira
- Asotin
- Banks Lake South
- Barney's Junction
- Barstow
- Basin City
- Benton City
- Bickleton
- Bingen
- Boyds
- Brewster
- Bridgeport
- Buena
- Burbank
- Carson
- Cascade Valley
- Cashmere
- Centerville
- Chelan
- Chelan Falls
- Cheney
- Chewelah
- Clarkston
- Clarkston Heights-Vineland
- Clayton
- Cle Elum
- Cliffdell
- Colfax
- College Place
- Colton
- Colville
- Conconully
- Connell
- Coulee City
- Coulee Dam
- Country Homes
- Cowiche
- Creston
- Curlew
- Curlew Lake
- Cusick
- Dallesport
- Danville
- Davenport
- Dayton
- Deer Park
- Desert Aire
- Disautel
- Dixie
- Donald
- Easton
- East Wenatchee
- Electric City
- Ellensburg
- Elmer City
- Endicott
- Entiat
- Ephrata
- Eschbach
- Fairchild AFB
- Fairfield
- Fairwood
- Farmington
- Finley
- Four Lakes
- Garfield
- Garrett
- George
- Gleed
- Goldendale
- Grand Coulee
- Grandview
- Granger
- Green Bluff
- Harrah
- Harrington
- Hartline
- Hatton
- Inchelium
- Ione
- Kahlotus
- Keller
- Kennewick
- Kettle Falls
- Kittitas
- Klickitat
- Krupp
- LaCrosse
- Lakeview
- Lamont
- Latah
- Laurier
- Leavenworth
- Liberty Lake
- Lind
- Loomis
- Loon Lake
- Lyle
- Mabton
- Malden
- Malo
- Malott
- Mansfield
- Manson
- Marcus
- Maryhill
- Mattawa
- Mead
- Medical Lake
- Mesa
- Metaline
- Metaline Falls
- Methow
- Millwood
- Moses Lake
- Moses Lake North
- Moxee
- Naches
- Nespelem
- Nespelem Community
- Newport
- Nile
- North Bonneville
- North Omak
- Northport
- Oakesdale
- Odessa
- Okanogan
- Omak
- Orient
- Oroville
- Othello
- Otis Orchards-East Farms
- Outlook
- Palouse
- Parker
- Pasco
- Pateros
- Pine Grove
- Pomeroy
- Prescott
- Prosser
- Pullman
- Quincy
- Reardan
- Republic
- Richland
- Ritzville
- Riverside
- Rockford
- Rock Island
- Ronald
- Roosevelt
- Rosalia
- Roslyn
- Royal City
- St. John
- Selah
- Snoqualmie Pass
- Soap Lake
- South Cle Elum
- South Wenatchee
- Spangle
- Spokane
- Spokane Valley
- Sprague
- Springdale
- Starbuck
- Steptoe
- Stevenson
- Summitview
- Sunnyside
- Sunnyslope
- Tampico
- Tekoa
- Terrace Heights
- Thorp
- Tieton
- Tonasket
- Toppenish
- Torboy
- Touchet
- Town and Country
- Trout Lake
- Twin Lakes
- Twisp
- Union Gap
- Uniontown
- Valley
- Vantage
- Waitsburg
- Walla Walla
- Walla Walla East
- Wallula
- Wapato
- Warden
- Washtucna
- Waterville
- Waverly
- Wenatchee
- West Clarkston-Highland
- West Pasco
- West Richland
- White Salmon
- White Swan
- Wilbur
- Wilson Creek
- Winthrop
- Wishram
- Yakima
- Zillah