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Area code 206 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Washington. The numbering plan area (NPA) includes Seattle and most of its innermost suburbs. This includes such suburbs as Shoreline and Lake Forest Park ; Mercer , Bainbridge , and Vashon Islands; and portions of metropolitan Seattle from ...
The U.S. state of Washington has six telephone area codes. The state initially used a single area code until it was divided in 1957 with the creation of area code 509 to serve Eastern Washington. In 1995, 206 was split again to serve just the Puget Sound region after area code 360 was created for the remainder of Western Washington.
206: Washington (Seattle area) 1947: created for all of Washington; ... area code 387 is reserved as a fifth code for the region; 438: Quebec (Montreal metropolitan area)
Area code 209 was created in an area code split of area code 415 on October 26, 1957. On November 14, 1998, the southern half of this numbering plan area received the assignment of area code 559 . On October 24, 2021, 209 was transitioned to 1+10-digit dialing despite not being part of an overlay complex at that time.
Most of the region outside the Seattle and Tacoma areas was split from 206 to form a new numbering plan area with area code 360. By the late 1990s, projections indicated possible exhaustion once again, so that in 1999, area code 564 was assigned for installation as an overlay of NPA 360, with an in-service date of August 1, 2000.
The numbering plan area includes the Eastside, extending east to North Bend, north to Everett, and south to Maple Valley. It also includes the cities of Bellevue and Redmond, both major employment centers. The area code was created in 1997 in a three-way split of area code 206.
In 1951, the number of area codes grew to ninety: the State of New York gained area code 516 on Long Island, and Southern California received area code 714, to reduce the numbering plan area of Los Angeles. [23] Area code handbook issued by many telephone companies in 1962 to promote the newly introduced direct distance dialing.
This realignment resulted in Sacramento changing from area code 415 to 916, and Bakersfield to 213. During the initial trials of DDD, starting in 1951, area code 318 was temporarily installed for the new toll-switching center in San Francisco to separate calls destined through Oakland (415), as six-digit translation was not available until two ...