Washington area codes
Encyclopedia
The U.S. state of Washington currently has five telephone
Telephone
The telephone , colloquially referred to as a phone, is a telecommunications device that transmits and receives sounds, usually the human voice. Telephones are a point-to-point communication system whose most basic function is to allow two people separated by large distances to talk to each other...

 area codes. The first was area code 206
Area code 206
206 is the North American telephone area code in the U.S. state of Washington for Seattle, the islands of Mercer, Bainbridge and Vashon, and portions of metropolitan Seattle from Des Moines to Woodway....

 which at the time covered all the state. In 1957 the state was divided in half when area code 509
Area code 509
North American area code 509 is a state of Washington telephone area code. 509 covers central and eastern Washington, including Spokane, the Tri-Cities, Yakima, Walla Walla, and Wenatchee...

 was created to cover Eastern Washington
Eastern Washington
Eastern Washington is the portion of the U.S. state of Washington east of the Cascade Range. The region contains the city of Spokane , the Tri-Cities, the Columbia River and the Grand Coulee Dam, the Hanford Nuclear Reservation and the fertile farmlands of the Yakima Valley and the...

 leaving 206 to cover Western Washington
Western Washington
Western Washington is a region of the United States defined as that part of Washington west of the Cascade Mountains.It is known as being far wetter in climate than the eastern portion of the state, which...

. In 1995 206 was split again covering just the Puget Sound Area after Area code 360
Area code 360
Area code 360 is the area code for western Washington state outside of metropolitan Seattle. It began service on January 15, 1995. The area, which encompasses all of western Washington outside of urban King, Pierce, and Snohomish counties and Bainbridge Island, was previously part of area code 206...

 was created to cover the remaining area. The most current split as of 2009 was in 1997 when 425
Area code 425
Area code 425 is a telephone dialing code in Washington for the suburbs north and east of Seattle, particularly the Eastside, extending east to North Bend, north to Everett, and south to Maple Valley....

 and 253
Area code 253
Area code 253 is a telephone dialing code in Washington for the suburbs south of Seattle and of the southern Puget Sound area, centered at Tacoma and extending to include the areas around Gig Harbor, Auburn, and Roy...

 took over most of the Seattle Metro leaving 206 to cover just the city of Seattle and neighboring cities in King and Snohomish counties.

564
Area code 564
564 is a proposed area code for the state of Washington covering all of Western Washington, including Seattle. It would be an overlay plan for the 206, 253, 360, and 425 area codes...

 has been proposed as a future overlay
Overlay plan
In telephony, especially in North America, an overlay plan is the practice of introducing a new area code by applying it onto a geographic area that is already occupied by one or more existing area codes, resulting in two area codes serving the same area.- Methodology :Prior to the introduction of...

 for the 206, 253, 360 and 425 area codes. As of December 2009 it has not been implemented.

Area code 206, Seattle

Area code 206
Area code 206
206 is the North American telephone area code in the U.S. state of Washington for Seattle, the islands of Mercer, Bainbridge and Vashon, and portions of metropolitan Seattle from Des Moines to Woodway....

 is the North American
North American
North American generally refers to an entity, people, group, or attribute of North America, especially of the United States and Canada together.-Culture:*North American English, a collective term used to describe American English and Canadian English...

 telephone
Telephone
The telephone , colloquially referred to as a phone, is a telecommunications device that transmits and receives sounds, usually the human voice. Telephones are a point-to-point communication system whose most basic function is to allow two people separated by large distances to talk to each other...

 area code
Telephone numbering plan
A telephone numbering plan is a type of numbering scheme used in telecommunications to allocate telephone numbers to subscribers and to route telephone calls in a telephone network. A closed numbering plan, such as found in North America, imposes a fixed total length to numbers...

in the U.S. state
U.S. state
A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Washington for Seattle, the islands of Mercer
Mercer Island, Washington
Mercer Island is a city in King County, Washington, United States and the name of the island in Lake Washington on which the city sits. The population was 22,699 at the 2010 census....

, Bainbridge
Bainbridge Island, Washington
Bainbridge Island is a city in Kitsap County, Washington, United States, and the name of the island in Puget Sound on which the city is situated...

 and Vashon
Vashon Island
Vashon is a census-designated place in King County, Washington, United States. It covers an island alternately called Vashon Island or Vashon-Maury Island, the largest island in Puget Sound south of Admiralty Inlet. The population was 10,624 at the 2010 census. At , it is about 60 percent larger...

, and portions of the Seattle metro area from Des Moines
Des Moines, Washington
Des Moines is a city in King County, Washington, United States. The population was 29,673 at the 2010 census. Property within the city has been the subject of land buyouts because of noise from aircraft landing or taking off from the Seattle-Tacoma International Airport two miles to the north of...

 to Woodway
Woodway, Washington
Woodway is a city in Snohomish County, Washington, United States. The population was 1,307 at the 2010 census.Based on per capita income, one of the more reliable measures of affluence, Woodway ranks 9th of 522 areas in the state of Washington to be ranked...

.

Area code 206 was one of the original area codes created in 1947. In 1957, area code 509
Area code 509
North American area code 509 is a state of Washington telephone area code. 509 covers central and eastern Washington, including Spokane, the Tri-Cities, Yakima, Walla Walla, and Wenatchee...

 was created for the area east of the Cascades in a flash-cut
Flash-cut
A flash-cut, also called flash-cutover, is an immediate change in a complex system, with no phase-in period.Some telephone area codes were split immediately, rather than being phased in with a permissive dialing period. An example is telephone area code 213, which was split into 213 and 714 all at...

. It split to form area 360 (one of the first 2 area codes not of N0X/N1X form) in 1995, and underwent a 3-way split in 1997 to form areas 253 and 425.

Area code 253, Tacoma

Area code 253
Area code 253
Area code 253 is a telephone dialing code in Washington for the suburbs south of Seattle and of the southern Puget Sound area, centered at Tacoma and extending to include the areas around Gig Harbor, Auburn, and Roy...

 is a telephone dialing code in Washington for the suburbs south of Seattle and of the southern Puget Sound
Puget Sound
Puget Sound is a sound in the U.S. state of Washington. It is a complex estuarine system of interconnected marine waterways and basins, with one major and one minor connection to the Strait of Juan de Fuca and the Pacific Ocean — Admiralty Inlet being the major connection and...

 area, centered at Tacoma
Tacoma, Washington
Tacoma is a mid-sized urban port city and the county seat of Pierce County, Washington, United States. The city is on Washington's Puget Sound, southwest of Seattle, northeast of the state capital, Olympia, and northwest of Mount Rainier National Park. The population was 198,397, according to...

 and extending to include the areas around Gig Harbor
Gig Harbor, Washington
Gig Harbor is the name of both a bay on Puget Sound and a city on its shore in Pierce County, Washington, United States. The population was 7,126 at the 2010 census....

, Auburn
Auburn, Washington
-Parks:Auburn has an extensive system of parks, open space and urban trails comprising 29 developed parks, 5 undeveloped sites under planning, 2 skate parks, 2 water roatary parks, and over of trails , and almost of open space for passive and active recreation.-Environmental Park:The Auburn...

, and Roy
Roy, Washington
Roy is a city in Pierce County, Washington, United States. The population was 793 at the 2010 census.-History:Roy was officially incorporated on January 16, 1908. It is a rural city outside Tacoma and primarily features ranch-style homes and farms. Roy was one of the early communities in the area,...

. It currently serves the western half of Pierce County
Pierce County, Washington
right|thumb|[[Tacoma, Washington|Tacoma]] - Seat of Pierce CountyPierce County is the second most populous county in the U.S. state of Washington. Formed out of Thurston County on December 22, 1852, by the legislature of Oregon Territory...

, Washington and Federal Way
Federal Way, Washington
Federal Way is a city in King County, Washington, United States. Federal Way is located between Seattle and Tacoma. Its western boundary is Puget Sound. It is bordered by Des Moines on the north, Kent, unincorporated King County, and Milton on the east and Tacoma and Fife on the south...

.

The area code went into service on April 27, 1997 as part of a three-way split of area code 206
Area code 206
206 is the North American telephone area code in the U.S. state of Washington for Seattle, the islands of Mercer, Bainbridge and Vashon, and portions of metropolitan Seattle from Des Moines to Woodway....

.

Area code 360, Olympia

Area code 360
Area code 360
Area code 360 is the area code for western Washington state outside of metropolitan Seattle. It began service on January 15, 1995. The area, which encompasses all of western Washington outside of urban King, Pierce, and Snohomish counties and Bainbridge Island, was previously part of area code 206...

 is the area code for western Washington state outside of the greater Seattle metropolitan area. It began service on January 15, 1995. The area, which encompasses all of western Washington outside of urban King
King County, Washington
King County is a county located in the U.S. state of Washington. The population in the 2010 census was 1,931,249. King is the most populous county in Washington, and the 14th most populous in the United States....

, Pierce
Pierce County, Washington
right|thumb|[[Tacoma, Washington|Tacoma]] - Seat of Pierce CountyPierce County is the second most populous county in the U.S. state of Washington. Formed out of Thurston County on December 22, 1852, by the legislature of Oregon Territory...

, and Snohomish
Snohomish County, Washington
Snohomish County is a county located in the U.S. state of Washington. It is named after the Snohomish tribe. Since 2000, the county's population has grown from 606,024 to 713,335 residents , making it one of the fastest-growing in the state, ranking third in overall population after King and...

 counties and Bainbridge Island
Bainbridge Island, Washington
Bainbridge Island is a city in Kitsap County, Washington, United States, and the name of the island in Puget Sound on which the city is situated...

, was previously part of area code 206
Area code 206
206 is the North American telephone area code in the U.S. state of Washington for Seattle, the islands of Mercer, Bainbridge and Vashon, and portions of metropolitan Seattle from Des Moines to Woodway....

. The 360 area code was one of the first two area codes that did not take the N1X or N0X form (i.e., the middle digit is neither 0 nor 1) in the North American Numbering Plan
North American Numbering Plan
The North American Numbering Plan is an integrated telephone numbering plan administered by Neustar which encompasses 24 countries and territories, including the United States and its territories, Canada, Bermuda, and 16 nations of the Caribbean...

, along with Alabama area code 334
Area code 334
Area code 334 is a NANPA area code in the state of Alabama. It was created on January 15, 1995 as a split from area code 205 The 334 area code was one of the first two area codes not to take the N1X or N0X form in the North American Numbering Plan, along with Washington area code 360, which began...

, which began service on the same day.

Area code 425, Everett

Area code 425
Area code 425
Area code 425 is a telephone dialing code in Washington for the suburbs north and east of Seattle, particularly the Eastside, extending east to North Bend, north to Everett, and south to Maple Valley....

 is a telephone dialing code in Washington for the suburbs north and east of Seattle, particularly the Eastside
Eastside (King County, Washington)
File:Seattle-lakewashington-lakesammamish.PNG|250px|right|The Eastside is to the right of Seattle.# rough city boundariespoly 137 256 148 256 158 194 172 179 172 237 212 266 133 266Renton...

, extending east to North Bend
North Bend, Washington
North Bend is a city in King County, Washington, United States. The town was made famous by David Lynch's television series Twin Peaks Since the Weyerhaeuser sawmill closed, North Bend has become an upscale bedroom community for the Eastside of Seattle, Washington, with property values more than...

, north to Everett
Everett, Washington
Everett is the county seat of and the largest city in Snohomish County, Washington, United States. Named for Everett Colby, son of founder Charles L. Colby, it lies north of Seattle. The city had a total population of 103,019 at the 2010 census, making it the 6th largest in the state and...

, and south to Maple Valley
Maple Valley, Washington
Maple Valley is a city in King County, Washington, United States. The population was 22,684 at the 2010 census.-History:The area was first settled in 1879 by three men who were improving a trail and brought their families in. When a name for a future community was proposed, the names Vine Maple...

.

The area code went into service on April 27, 1997 as part of a three-way split of area code 206
Area code 206
206 is the North American telephone area code in the U.S. state of Washington for Seattle, the islands of Mercer, Bainbridge and Vashon, and portions of metropolitan Seattle from Des Moines to Woodway....

.

Area code 509, Spokane

Area code 509
Area code 509
North American area code 509 is a state of Washington telephone area code. 509 covers central and eastern Washington, including Spokane, the Tri-Cities, Yakima, Walla Walla, and Wenatchee...

 is a state
U.S. state
A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Washington telephone
Telephone
The telephone , colloquially referred to as a phone, is a telecommunications device that transmits and receives sounds, usually the human voice. Telephones are a point-to-point communication system whose most basic function is to allow two people separated by large distances to talk to each other...

 area code which covers central and eastern Washington, including Spokane
Spokane, Washington
Spokane is a city located in the Northwestern United States in the state of Washington. It is the largest city of Spokane County of which it is also the county seat, and the metropolitan center of the Inland Northwest region...

, the Tri-Cities
Tri-Cities, Washington
The Tri-Cities is a mid-sized metropolitan area in the southeastern part of the U.S. state of Washington, consisting of three neighboring cities: Kennewick, Pasco, and Richland. The cities are located at the confluence of the Yakima, Snake, and Columbia rivers in the semi-arid region of...

, Yakima
Yakima, Washington
Yakima is an American city southeast of Mount Rainier National Park and the county seat of Yakima County, Washington, United States, and the eighth largest city by population in the state itself. As of the 2010 census, the city had a total population of 91,196 and a metropolitan population of...

, Walla Walla
Walla Walla, Washington
Walla Walla is the largest city in and the county seat of Walla Walla County, Washington, United States. The population was 31,731 at the 2010 census...

, and Wenatchee
Wenatchee, Washington
Wenatchee is located in North Central Washington and is the largest city and county seat of Chelan County, Washington, United States. The population within the city limits in 2010 was 31,925...

. It was created in a split from area code 206
Area code 206
206 is the North American telephone area code in the U.S. state of Washington for Seattle, the islands of Mercer, Bainbridge and Vashon, and portions of metropolitan Seattle from Des Moines to Woodway....

 in a flash-cut
Flash-cut
A flash-cut, also called flash-cutover, is an immediate change in a complex system, with no phase-in period.Some telephone area codes were split immediately, rather than being phased in with a permissive dialing period. An example is telephone area code 213, which was split into 213 and 714 all at...

 on January 1, 1957.

Currently, the Washington Utilities and Transportation Commission
Washington Utilities and Transportation Commission
The Washington Utilities and Transportation Commission is a three-member board appointed by the Governor of Washington and confirmed by the Washington State Senate to six year terms...

 forecasts that supply of 509 area code numbers will not be exhausted until 2014.

Area code 564, Proposed

Area code 564
Area code 564
564 is a proposed area code for the state of Washington covering all of Western Washington, including Seattle. It would be an overlay plan for the 206, 253, 360, and 425 area codes...

 is a proposed area code for the state of Washington covering all of Western Washington
Western Washington
Western Washington is a region of the United States defined as that part of Washington west of the Cascade Mountains.It is known as being far wetter in climate than the eastern portion of the state, which...

, including Seattle. It would be an overlay plan
Overlay plan
In telephony, especially in North America, an overlay plan is the practice of introducing a new area code by applying it onto a geographic area that is already occupied by one or more existing area codes, resulting in two area codes serving the same area.- Methodology :Prior to the introduction of...

 for the 206
Area code 206
206 is the North American telephone area code in the U.S. state of Washington for Seattle, the islands of Mercer, Bainbridge and Vashon, and portions of metropolitan Seattle from Des Moines to Woodway....

, 253
Area code 253
Area code 253 is a telephone dialing code in Washington for the suburbs south of Seattle and of the southern Puget Sound area, centered at Tacoma and extending to include the areas around Gig Harbor, Auburn, and Roy...

, 360
Area code 360
Area code 360 is the area code for western Washington state outside of metropolitan Seattle. It began service on January 15, 1995. The area, which encompasses all of western Washington outside of urban King, Pierce, and Snohomish counties and Bainbridge Island, was previously part of area code 206...

, and 425
Area code 425
Area code 425 is a telephone dialing code in Washington for the suburbs north and east of Seattle, particularly the Eastside, extending east to North Bend, north to Everett, and south to Maple Valley....

 area codes. As of November 2009, it has not been implemented.

In 1999, the 564 area code was proposed as an overlay of area code 360
Area code 360
Area code 360 is the area code for western Washington state outside of metropolitan Seattle. It began service on January 15, 1995. The area, which encompasses all of western Washington outside of urban King, Pierce, and Snohomish counties and Bainbridge Island, was previously part of area code 206...

, which serves areas of Western Washington outside of the Seattle Tacoma metropolitan area
Seattle metropolitan area
The Seattle metropolitan area in the US state of Washington includes the city of Seattle, King County, Snohomish County, and Pierce County within the Puget Sound region. The U.S...

. This version of the NPA was slated for implementation on July 29, 2000. Later, the Washington Utilities and Transportation Commission
Washington Utilities and Transportation Commission
The Washington Utilities and Transportation Commission is a three-member board appointed by the Governor of Washington and confirmed by the Washington State Senate to six year terms...

 (WUTC) determined that the actual increase in need for new numbers in 360 had fallen short of projections, and postponed the NPA until at least February 2001.

In May 2000, the commission projected that the metropolitan Seattle area codes (206, 253, and 425) would also soon exhaust their number pools, and expanded the 564 plan to include those areas as well. By the summer, however, this was determined to be not immediately necessary. The NPA was then planned for application on October 20, 2001.

On August 22, 2001, the WUTC announced that, due to increased efficiency in the reuse of the existing number pool, the immediate need for the new NPA had subsided. Part of this was also attributed to a downturn in the telecommunications sector. The commission put off implementation until no earlier than October 20, 2002.

Since the development of the initial plan for the area code, the WUTC and the NANPA
North American Numbering Plan
The North American Numbering Plan is an integrated telephone numbering plan administered by Neustar which encompasses 24 countries and territories, including the United States and its territories, Canada, Bermuda, and 16 nations of the Caribbean...

 have rebuffed the telephone companies' request for a new NPA and instead directed them to actively share and efficiently use the number blocks already assigned. This mainly refers to the practice of number pooling
Number pooling
Number pooling is a method of reallocating telephony numbering space in the North American Numbering Plan, primarily in growth areas in the United States....

, or dividing telephone exchange
Telephone exchange
In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls...

s (aka prefixes) into up to 10 1,000-number blocks, instead of a whole prefix's numbering space being assigned wholesale to one carrier.

The earliest current NANP estimate for when any Western Washington area code will run out of number blocks is the second quarter of 2012http://nanpa.com/pdf/NRUF/2009_1_NPA_Exhaust_Projections.pdf, as the WUTC has taken further steps to decrease the need for new number blocks in 360
Area code 360
Area code 360 is the area code for western Washington state outside of metropolitan Seattle. It began service on January 15, 1995. The area, which encompasses all of western Washington outside of urban King, Pierce, and Snohomish counties and Bainbridge Island, was previously part of area code 206...

 and 509
Area code 509
North American area code 509 is a state of Washington telephone area code. 509 covers central and eastern Washington, including Spokane, the Tri-Cities, Yakima, Walla Walla, and Wenatchee...

 and head off the need for new NPAs.

When area code 564 goes into effect, it will require 10-digit dialing
10-digit dialing
In the United States and Canada, 10-digit dialing is a popular term used to refer to the practice of including the area code of a phone number when dialing...

 for all local phone calls in Western Washington. Currently, local calls within an NPA can use 7-digit dialing
7-digit dialing
7-digit dialing is a popular term referring to the traditional convention in the United States and Canada for dialing local phone calls. It is also sometimes known as local format or network format....

.

External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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