This is a list of area codes in California and when they were created: - 209 - Stockton, Modesto, Merced; the northern San Joaquin Valley and the central Sierra Nevada range. (Split from 916 on January 1, 1958)
- 213 - Downtown Los Angeles, surrounded by 323 (October, 1947)
- 310 - Santa Monica, Malibu, Pacific Palisades, Compton, Torrance, Beverly Hills, Catalina Island; the southwestern portion of Los Angeles County. (Split from 213 on November 2, 1991; overlaid by 424 on August 26, 2006)
- 323 - a ring around downtown Los Angeles, including the Hollywood and Eagle Rock districts of Los Angeles, Florence, Montebello and East Los Angeles. (Split from 213 on June 13, 1998)
- 408 - San Jose, Sunnyvale, Gilroy, Morgan Hill, and Los Gatos; most of Santa Clara County. (Split from 415 on January 1, 1959)
- 415 - San Francisco, San Rafael, Novato; all of San Francisco County, most of Marin County and a small portion of northern San Mateo County (October 1947)
- 424 - Overlay to 310 (see above) (August 26, 2006)
- 510 - Oakland, Fremont, Hayward, Berkeley and Richmond; western Alameda and Contra Costa Counties. (Split from 415 on September 2, 1991)
- 530 - Redding, Chico,Marysville, Red Bluff, Oroville, Placerville, Truckee; northwestern California including most of the Sacramento Valley, the northern Sierra Nevada and the Lake Tahoe region. (Split from 916 on November 1, 1997)
- 559 - Fresno, Visalia, Madera, Hanford; the central San Joaquin Valley and the southern Sierra Nevada range. (Split from 209 on November 14, 1998)
- 562 - Long Beach, Whittier;Norwalk, Lakewood, Bellflower, Cerritos, southeast Los Angeles County and a small portion of coastal Orange County. (Split from 310 on January 25, 1997)
- 619 - Downtown San Diego, Chula Vista, National City, Imperial Beach; southern San Diego County. (Split from 714 on January 1, 1982)
- 626 - Pasadena, El Monte, West Covina; the San Gabriel Valley and eastern suburbs of Los Angeles. (Split from 818 on June 14, 1997)
- 650 - San Mateo, Palo Alto, Redwood City, Daly City; most of San Mateo County and northwestern Santa Clara County (i.e. the San Francisco Peninsula with the exception of the city and county of San Francisco). (Split from 415 on August 2, 1997)
- 657 - Anaheim, Huntington Beach, Santa Ana, Orange, Garden Grove; northern and western Orange County (overlay with 714) (September 23, 2008)
- 661 - Bakersfield, Santa Clarita, Palmdale; northern Los Angeles County including the Antelope Valley and most of Kern County, including the southern San Joaquin Valley. (Split from 805 on February 13, 1999)
- 707 - Santa Rosa, Eureka, Petaluma, Napa, Vallejo, Fairfield; northwestern California, including the northern Bay Area, the Redwood Empire and the Wine Country. (Split from 415 on January 1, 1959)
- 714 - Anaheim, Huntington Beach, Santa Ana, Orange, Garden Grove; northern and western Orange County (Overlay with Area code 657) (Split from 213 on January 1, 1951)
- 747 - Will overlay 818, effective May 18, 2009.
- 760 - Palm Springs, Oceanside, Bishop, Ridgecrest, Barstow, El Centro, Needles; northern San Diego County, and southeastern California, including much of the Mojave Desert and the Owens Valley. (Split from 619 on March 22, 1997, overlayed by area code 442 in 2009)
- 805 - Santa Barbara, San Luis Obispo, Ventura, Oxnard, Santa Maria, Santa Paula; southwest Central Coast, including San Luis Obispo, Santa Barbara and Ventura counties. (Split from 213 on January 1, 1957)
- 818 - Burbank, Glendale, the North Hollywood, Van Nuys, Panorama City, Sherman Oaks and Northridge districts of Los Angeles; the San Fernando Valley. (Split from 213 on January 7, 1984)
- 831 - Monterey, Santa Cruz, Salinas, and Hollister; the northern Central Coast. (Split from 408 on July 11, 1998)
- 858 - Del Mar, La Jolla, Poway, Solana Beach and the northern portion of the city of San Diego; west-central San Diego County. (Split from 619 on June 12, 1999)
- 909 - San Bernardino, Ontario, Pomona, and Chino; eastern Los Angeles County and southwestern San Bernardino County. (Split from 714 on November 14, 1992)
- 916 - Sacramento and most of the Sacramento metro: Folsom, Roseville; Sacramento County and southern Placer County (October 1947)
- 925 - Concord, Walnut Creek, Livermore, Pleasanton, San Ramon, Martinez, and Antioch; eastern Alameda and Contra Costa Counties. (Split from 510 on March 14, 1998)
- 949 - Irvine, Laguna Beach, Newport Beach, San Juan Capistrano; southern and eastern Orange County. (Split from 714 on April 18, 1998)
- 951 - Riverside, Corona, Moreno Valley, Perris, Temecula, Murrieta; western Riverside County. (Split from 909 on July 17, 2004)
- Note: Exchange boundaries do not follow city or county boundaries; many of the area codes include or exclude slivers of the cities or counties listed above. For example, the boundary between 562 and 714 generally follows the boundary between Los Angeles and Orange Counties, but portions of Los Angeles County are in 714 and portions of Orange County are in 562. Similarly, most of Daly City is in 650, but a small portion is in 415.
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