Area code 805 is a California telephone area code that was split from area code 213 in 1957. It includes most or all of the California counties of San Luis Obispo, Santa Barbara, and Ventura, plus southernmost portions of Monterey County.
On February 13, 1999, it was split again, with area code 661 having been created for the inland areas, which are San Joaquin Valley, Santa Clarita Valley, and Antelope Valley.
Area code 805 also serves the US military facilities in Kwajalein, Republic of the Marshall Islands with a Paso Robles prefix (805-355-xxxx). This arrangement originated from the US Army's first satellite communications station having been built at nearby Camp Roberts.
In August 2016 the California Public Utilities Commission held a series of hearings regarding the potential need to provide a relief area code for 805 in the form of an overlay or a split. According to the website Lincmad.com, 820 is a possible overlay code.
Coordinates: 34°36′N 120°12′W / 34.6°N 120.2°W