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Area code 564 is a telephone overlay area code in the North American Numbering Plan (NANP) for Western Washington state, including metropolitan Seattle. The area code was first proposed in 1999 to relieve telephone number shortages in area code 360 , but implementation was delayed until 2017, when it was installed for an overlay complex that ...
Original statewide area code until 1957, when area code 509 was created for Eastern Washington. Further splits in 1995 to create area code 360 for most of Western Washington, and 1997 to form area codes 253 and 425. 564 will be added to the 206 area in 2025. 509: January 1, 1957 [1]
An area code overlay is a numbering plan area ... Overlay area codes Location Notes Added ... 564 initially overlays only 360, ...
Quick Take: List of Scam Area Codes. More than 300 area codes exist in the United States alone which is a target-rich environment for phone scammers.
To find out the 25 poorest and richest area codes, GOBankingRates used the 2015 Census Community Survey, the most recent data available, to rank cities across the nation in order of mean household ...
Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
564: 206: Washington: 2026 – 1st Qtr: April 5, 2025 [19] Other area codes that are expected to exhaust by the end of 2027 that do not have an approved relief plan: ...
On August 28, 2017 numbering plan area 360 was assigned the second area code, 564, to form an overlay numbering plan. [5] Area code 564 is intended to eventually overlay other western Washington NPAs (206, 253, and 425) when demand requires numbering relief action. [5] Beginning July 29, 2017 all calls in western Washington required ten-digit ...