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
, and 425
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
, which serves areas of Western Washington outside of the Seattle Tacoma metropolitan area
. This version of the NPA was slated for implementation on July 29, 2000. Later, the Washington Utilities and Transportation Commission
(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
have rebuffed the telephone companies' request for a new NPA and... Read More