Area Code 509 in Washington
Area Code 509 covers the the eastern two-thirds of the State of Washington. Area Code 509 was introduced on 1 January 1957 when it was split off from Area Code 206. Area Code 509 has remained unchanged for more than half a century. Even with the proliferation of cell phones and pagers, Area Code 509 is nowhere near exhaustion. Under current projections, eastern Washington will not need another area code until 2031. Within Area Code 509 there are 124 towns and cities in 24 counties.
Area Code 509 currently has 664 active Exchange Codes, with the last being introduced on 16 November 2017, giving a total number pool of 4,410,000 numbers.
In this Area Code there are 1773 telephone numbers that have been the subject of complaints to the FCC and 18418 telephone numbers that our research shows belong to legitimate businesses.