Area codes 805 and 820 are telephone

area code A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, rea ...

s in the

North American Numbering Plan The North American Numbering Plan (NANP) is an integrated telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1, World Numbering Zone ...

(NANP) for the U.S. state of

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

. The numbering plan area (NPA) includes most or all of the counties of

San Luis Obispo ; ; ; Chumashan languages, Chumash: ''tiłhini'') is a city and county seat of San Luis Obispo County, California, United States. Located on the Central Coast (California), Central Coast of California, San Luis Obispo is roughly halfway betwee ...

, Santa Barbara, Ventura, and the southernmost portions of Monterey County. 805 was split from area code 213 in 1957, and area code 820 was added to the NPA in 2018, creating an area code overlay.

History

Area code 805 was created in 1957, when one of the original North American area codes in California, 213, was reduced in size to provide more central office codes in the Los Angeles area. In 1998, the California-Nevada Code Administration (CNCA) determined that California was under "substantial number growth" which required exhaustion mitigation in the 805 numbering plan area, by splitting the eastern part of the NPA into a new plan area with the area code 661. The split was effective on February 13, 1999, for the

San Joaquin Valley The San Joaquin Valley ( ; Spanish language in California, Spanish: ''Valle de San Joaquín'') is the southern half of California's Central Valley (California), Central Valley. Famed as a major breadbasket, the San Joaquin Valley is an importa ...

, Santa Clarita Valley, and

Antelope Valley The Antelope Valley is a valley primarily located in northern Los Angeles County, California, United States and the southeast portion of Kern County, California, Kern County, and constitutes the western tip of the Mojave Desert. It is situated ...

. In August 2016, the California Public Utilities Commission held a series of hearings for the decision of providing a relief area code in NPA 805 in the form of an overlay or an area code split. On May 25, 2017, the Commission approved 820 as an overlay area code. New telephone numbers of 820 area code began service in June 2018, requiring

ten-digit dialing Ten-digit dialing is a telephone dialing procedure in the countries and territories of the North American Numbering Plan (NANP). It is the practice of including the area code of a telephone number when Dialling (telephony), dialing to initiate a t ...

for all calls. In addition to the municipalities below, area code 805 also serves the US military facilities in Kwajalein, Republic of the Marshall Islands with a Paso Robles

prefix A prefix is an affix which is placed before the stem of a word. Particularly in the study of languages, a prefix is also called a preformative, because it alters the form of the word to which it is affixed. Prefixes, like other affixes, can b ...

(805-355). This arrangement originated from the US Army's first satellite communications station having been built at nearby Camp Roberts.

Service area

Monterey County

* Bradley * Gorda * Bryson * Parkfield

San Luis Obispo County

* Arroyo Grande * Atascadero * Avila Beach * Baywood-Los Osos * California Valley * Cambria * Cayucos * Cholame * Grover Beach * Halcyon *

Harmony In music, harmony is the concept of combining different sounds in order to create new, distinct musical ideas. Theories of harmony seek to describe or explain the effects created by distinct pitches or tones coinciding with one another; harm ...

* Lake Nacimiento * Los Osos * Morro Bay * Nipomo * Oceano * Paso Robles *

Pismo Beach Pismo Beach (Chumashan languages, Chumash: ''Pismuʔ'') is a city in the southern portion of San Luis Obispo County, California, San Luis Obispo County, in the Central Coast (California), Central Coast area of California, United States. Its esti ...

* Pozo *

* San Miguel * San Simeon * Santa Margarita * Shandon * Templeton

Santa Barbara County

* Ballard * Buellton * Carpinteria * Casmalia * Garey * Gaviota * Goleta * Guadalupe * Hope Ranch * Isla Vista * Lompoc * Los Alamos * Los Olivos * Mission Canyon * Mission Hills * Montecito * Orcutt * Santa Barbara * Santa Maria * Santa Ynez * Sisquoc * Solvang * Summerland * Toro Canyon * Vandenberg SFB * Vandenberg Village * Ventucopa

Ventura County

* Bardsdale * Buckhorn * Camarillo * Casa Conejo * Channel Islands Beach * El Rio * Fillmore *

La Conchita La Conchita (; Spanish language, Spanish for "The Little Shell") is a small Unincorporated area, unincorporated community in western Ventura County, California, on U.S. Route 101 just southeast of the Santa Barbara County, California, Santa Ba ...

* Lake Sherwood * Meiners Oaks * Mira Monte * Montalvo * Moorpark * Newbury Park * Oak View * Ojai * Oxnard * Piru * Point Mugu * Port Hueneme * Santa Paula * Saticoy * Simi Valley * Somis * Thousand Oaks * Ventura

References

External links

{{coord, 34.6, -120.2, region:US-CA_type:adm2nd_dim:400km, display=title 805 820 805 820 Monterey County, California Santa Barbara County, California San Luis Obispo County, California Ventura County, California