25 Area codes in California

This is a list of area codes in California with service territory and installation dates.209 – Stockton, Modesto, Merced, Turlock; the northern San Joaquin Valley and the central Sierra Nevada range. 213 – Much of the City of Los Angeles and several inner suburbs 279 – overlay with 916, started service on March 10, 2018. 310 – The western and southwestern parts of Los Angeles County, including the Westside and South Bay regions. These include the cities and towns of Santa Monica, Malibu, Pacific Palisades, Compton, Torrance, Beverly Hills and Catalina Island. 323 – Much of the City of Los Angeles and several inner suburbs 341 – overlay with 510, started service on July 22, 2019. 408 – San Jose, Sunnyvale, Gilroy, Morgan Hill, and Los Gatos; most of Santa Clara County. 415 – San Francisco, San Rafael, Novato; all of San Francisco County, most of Marin County and a small portion of northern San Mateo County 424 – overlay with 310, started service on August 26, 2006. 442 – overlay with 760, started service on October 24, 2009. 510 – Oakland, Fremont, Hayward, Berkeley and Richmond; western Alameda and Contra Costa Counties. 530 – Redding, Chico, Davis, Marysville, Red Bluff, Oroville, Placerville, Truckee, Yuba City; northeastern California including most of the Sacramento Valley, the northern Sierra Nevada and the Lake Tahoe region. 559 – Fresno, Visalia, Madera, Hanford; the central San Joaquin Valley and the southern Sierra Nevada range. 562 – Long Beach, Whittier, Norwalk, Lakewood, Bellflower, Cerritos, southeast Los Angeles County and a small portion of coastal Orange County. 619 – City of San Diego and suburbs; created by a split from 714 on November 5, 1982; split off 760 on March 22, 1997, and 858 on June 12, 1999; re-merged with 858 in June 2018 to create the 619/858 overlay 626 – Most of the San Gabriel Valley including Pasadena, El Monte, West Covina. 628 – Overlay with 415, started service on March 21, 2015 650 – San Mateo, Palo Alto, Redwood City, Daly City; most of San Mateo County and northwestern Santa Clara County. 657 – Overlay with 714, started service on September 23, 2008 661 – Most of Kern County including Bakersfield; northern Los Angeles County including Lancaster, Palmdale, and Santa Clarita. 669 – Overlay with 408, started service on November 20, 2012 707 – Santa Rosa, Eureka, Sebastopol, Petaluma, Napa, Vallejo, Fairfield; northwestern California, including the northern Bay Area, the Redwood Empire and the Wine Country. 714 – Anaheim, Huntington Beach, Santa Ana, Orange, Westminster, Garden Grove, etc.; northern and western Orange County 747 – Overlay with 818, started service on May 18, 2009 760 – Palm Springs, Oceanside, Bishop, Ridgecrest, Barstow, El Centro, Needles, Victorville; northern San Diego County, eastern Riverside and San Bernardino Counties, and the Owens Valley. 805 – Santa Barbara, San Luis Obispo, Ventura, Oxnard, Santa Maria, Santa Paula; southwest Central Coast, including San Luis Obispo, Santa Barbara and Ventura counties. 818 – The San Fernando Valley of Los Angeles County: Burbank, Van Nuys, Glendale, Chatsworth, San Fernando, Panorama City and Northridge. 820 – Overlay with 805, started service on July 2, 2018 831 – Monterey, Santa Cruz, Salinas, and Hollister; the northern Central Coast. 840 – Overlay of 909 effective February 23, 2021 858 – City of San Diego and suburbs; originally created by a split from 619 on June 12, 1999; however, re-merged with 619 to create the 619/858 overlay in June 2018 909 – San Bernardino, Ontario, Pomona, and Chino; eastern Los Angeles County and southwestern San Bernardino County. 916 – Sacramento and most of the Sacramento metro: Folsom, Roseville; Sacramento County and southern Placer County 925 – Concord, Walnut Creek, Livermore, Pleasanton, San Ramon, Martinez, and Antioch; eastern Alameda and Contra Costa Counties. 949 – Irvine, Laguna Beach, Newport Beach, San Juan Capistrano, San Clemente; southern and eastern Orange County. 951 – Riverside, Corona, Moreno Valley, Perris, Temecula, Murrieta; western Riverside County.

Area code 209 is the California telephone area code that was split from area code 415 on October 26, 1957. It covers Stockton, Modesto, Turlock, Merced, Winton, Atwater, Livingston, Manteca, Ripon, Tracy, Lodi, Galt, Sonora, Los Banos, San Andreas, Mariposa, and Yosemite, the northern San Joaquin Valley, and the Sierra Foothills.

Area codes 213 and 323 are telephone area codes in the North American Numbering Plan (NANP) for the state of California. They are assigned to a numbering plan area (NPA) that comprises, roughly, the area of central Los Angeles, and includes several Southeast LA communities, such as Bell and Huntington Park. The area codes designated separate NPAs starting in 1998, when 323 was added, but were combined in an overlay plan into a single NPA in 2017. Previously, just downtown Los Angeles and immediately adjoining neighborhoods were served by area code 213, and the rest of central Los Angeles used area 323. Area code 213 is one of the original area codes created with the NANP in 1947, and was split five times over the decades.

Area codes 310 and 424 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. The numbering plan area includes the West Los Angeles and South Bay areas of Los Angeles County, a small portion of Ventura County, and Santa Catalina Island, which is located 26 miles (42 km) south.

Area codes 408 and 669 are telephone area codes in the North American Numbering Plan (NANP) in the U.S. state of California. The numbering plan area comprises most of Santa Clara County and Northern Santa Cruz County, and includes Gilroy, Morgan Hill, Saratoga, Los Gatos, Monte Sereno, Milpitas, Sunnyvale, Santa Clara, Cupertino, Campbell, and San Jose.

Area codes 415 and 628 are telephone area codes in the North American Numbering Plan (NANP) for the city of San Francisco and its northern suburbs in Marin County, and the northeast corner of San Mateo County. Area code 415 was one of the eighty-six original North American area codes established in 1947, but modified in geographic configuration later. Area code 628 was assigned in 2015 to form an overlay in that numbering plan area in mitigation of central office prefix exhaustion.

Area codes 510 and 341 are telephone area codes in the North American Numbering Plan (NANP) serving much of the East Bay in California. They cover parts of Contra Costa County and western Alameda County, including the city of Oakland, but excluding Dublin, Livermore, Pleasanton, and Sunol.

Area code 530 is a California telephone area code in northeastern and Northern California.

Area code 559 is a California telephone area code that was split from area code 209 on November 14, 1998.

Area code 562 is a California telephone area code that was split from area code 310 on January 25, 1997. It is the area code for much of southeastern Los Angeles County, including Long Beach, and parts of northern Orange County.

Area codes 619 and 858 are California telephone area codes serving most of San Diego County.

Area code 626 is a California telephone area code that was split from area code 818 on June 14, 1997. It covers most of the San Gabriel Valley and nearby areas in the northeastern portion of Los Angeles County, California, U.S., including Arcadia, Monrovia, El Monte, most of Pasadena and West Covina.

Area code 650 is a telephone area code in the North American Numbering Plan (NANP) for the San Francisco Bay Area in the U.S. state of California. It was split from area code 415 on August 2, 1997, and includes most of San Mateo County, part of San Francisco, and the northwestern portion of Santa Clara County including Palo Alto, Mountain View, and Los Altos.

Area codes 714 and 657 are California telephone area codes covering northern Orange County, a portion of Los Angeles County, and the Sleepy Hollow and Carbon Canyon areas of Chino Hills in San Bernardino County.

Area code 661 is a California telephone area code that covers the majority of California's Kern County, as well as part of Los Angeles County, Santa Barbara County, and Tulare County. It was split from area code 805 on February 13, 1999.

Area code 707 is a telephone area code in the North American Numbering Plan (NANP) for the northwestern part of the U.S. state of California. It was created by a split of area code 415 on March 1, 1959. It serves part of the northern San Francisco Bay Area, as well as the North Coast. Major cities in the area code include Napa, Sebastopol, Vallejo, Benicia, Fairfield, Santa Rosa, Windsor, Healdsburg, Rohnert Park, Petaluma, Fort Bragg, Rio Vista, Crescent City, Eureka, Clearlake, Vacaville, Dixon, and Ukiah.

Area codes 818 and 747 are California area codes that primarily cover the San Fernando Valley region of Los Angeles County, California.

Area code 760 is a California telephone area code that was split from area code 619 on March 22, 1997. Area code 442 is an overlay of 760 that became effective on November 21, 2009. It encompasses much of the southeastern and southernmost portions of California. The area includes Imperial, Inyo, and Mono counties, as well as portions of San Diego, Riverside, San Bernardino, Los Angeles and Kern counties.

Area codes 805 and 820 are California telephone area codes; 805 was originally split from area code 213 in 1957. They include most or all of the California counties of San Luis Obispo, Santa Barbara, Ventura, plus the southernmost portions of Monterey County.

Area code 831 is a telephone area code in the North American Numbering Plan (NANP) for a small region of the U.S. state of California. The numbering plan area (NPA) comprises Monterey County, San Benito County, and Santa Cruz County. The area code was created on July 11, 1998 in a split from area code 408.

Area codes 909 and 840 are telephone area codes in the North American Numbering Plan (NANP) for the far-eastern part of Los Angeles County and southwestern San Bernardino County in the U.S. state of California.

Area codes 916 and 279 are California telephone area codes that serve Sacramento, the state capital, and most of its suburbs. Area code 916 was one of the first three original area codes established in California in October 1947. It originally covered most of Northern California, but area code splits have reduced its coverage to the greater Sacramento area. Area code 279 began service in March 2018 to relieve an exhausted supply of telephone numbers in the 916 area code.

Area code 925 is a California telephone area code that was split from area code 510 on March 14, 1998. It covers the inland portions of the East Bay counties of Alameda and Contra Costa in the northern area of California.

Area code 949 is a California telephone area code that was split from area code 714 on April 18, 1998. It is an area mostly within southern Orange County. It also includes a small adjacent area of northwest San Diego County, specifically parts of Marine Corps Base Camp Pendleton and San Onofre State Park. Costa Mesa is shared between the 949 and 657/714 area codes, being split at Wilson Street and along Newport Boulevard. A very small portion of Irvine is also in the 657/714 area code, from the north side of Culver Drive at the I-5 to Jamboree Road in the Marketplace, in the neighborhood of Northpark Irvine.

Area code 951 is a California telephone area code that was split from area code 909 on July 17, 2004. It covers western Riverside County, including the cities and communities of Banning, Beaumont, Corona, Canyon Lake, Riverside, Temescal Valley, Woodcrest, Moreno Valley, Perris, Menifee, Lake Elsinore, Wildomar, Murrieta, Temecula, San Jacinto, Hemet, Lakeview, Nuevo, Norco, Eastvale, Jurupa Valley, and Idyllwild.