<P> Area code 820 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 . </P> <P> 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 . On May 25, 2017, the Commission approved 820 as an overlay area code . Mandatory dialing procedure (10 - digit dialling) began May 2018 . New telephone numbers with the 820 area code may be issued to customers beginning June 2018 . </P> <Ul> <Li> Bradley </Li> <Li> Gorda </Li> <Li> Bryson </Li> <Li> Parkfield </Li> </Ul> <Ul> <Li> Arroyo Grande </Li> <Li> Atascadero </Li> <Li> Avila Beach </Li> <Li> Baywood - Los Osos </Li> <Li> California Valley </Li> <Li> Cambria </Li> <Li> Cayucos </Li> <Li> Cholame </Li> <Li> Grover Beach </Li> <Li> Halcyon </Li> <Li> Harmony </Li> <Li> Lake Nacimiento </Li> <Li> Los Osos </Li> <Li> Morro Bay </Li> <Li> Nipomo </Li> <Li> Oceano </Li> <Li> Paso Robles </Li> <Li> Pismo Beach </Li> <Li> Pozo </Li> <Li> San Luis Obispo </Li> <Li> San Miguel </Li> <Li> San Simeon </Li> <Li> Santa Margarita </Li> <Li> Shandon </Li> <Li> Templeton </Li> </Ul>

Where is 805 area code located in california