The state of California, USA is currently served by a total of 39 area codes:
These California area codes overlay (cover the same geographic area). The first code listed is the parent code. Overlay area codes are added when no more phone numbers are available in an existing Numbering Plan Area.
| City | County | Area code(s) |
|---|---|---|
| Adelanto | San Bernardino | 760/442 |
| Alameda | Alameda | 510/341 |
| Alhambra | Los Angeles | 626 |
| Aliso Viejo | Orange | 949 |
| Altadena | Los Angeles | 626 |
| Anaheim | Orange | 714/657 |
| Antelope | Sacramento | 916/279 |
| Antioch | Contra Costa | 925 |
| Apple Valley | San Bernardino | 760/442 |
| Arcadia | Los Angeles | 626 |
| Atascadero | San Luis Obispo | 805/820 |
| Azusa | Los Angeles | 626 |
| Bakersfield | Kern | 661 |
| Baldwin Park | Los Angeles | 626 |
| Banning | Riverside | 951 |
| Beaumont | Riverside | 951 |
| Bell | Los Angeles | 323/213/738 |
| Bell Gardens | Los Angeles | 323/213/738 |
| Bellflower | Los Angeles | 562 |
| Berkeley | Alameda | 510/341 |
| Beverly Hills | Los Angeles | 310/424 |
| Brea | Orange | 714/657 |
| Brentwood | Contra Costa | 925 |
| Buena Park | Orange | 714/657 |
| Burbank | Los Angeles | 818/747 |
| Burlingame | San Mateo | 650 |
| Calexico | Imperial | 760/442 |
| Camarillo | Ventura | 805/820 |
| Campbell | Santa Clara | 408/669 |
| Carlsbad | San Diego | 760/442 |
| Carmichael | Sacramento | 916/279 |
| Carson | Los Angeles | 310/424 |
| Castro Valley | Alameda | 510/341 |
| Cathedral City | Riverside | 760/442 |
| Ceres | Stanislaus | 209/350 |
| Cerritos | Los Angeles | 562 |
| Chico | Butte | 530 |
| Chino | San Bernardino | 909/840 |
| Chino Hills | San Bernardino | 909/840 |
| Chula Vista | San Diego | 619/858 |
| Citrus Heights | Sacramento | 916/279 |
| Claremont | Los Angeles | 909/840 |
| Clovis | Fresno | 559 |
| Coachella | Riverside | 760/442 |
| Colton | San Bernardino | 909/840 |
| Compton | Los Angeles | 310/424 |
| Concord | Contra Costa | 925 |
| Corona | Riverside | 951 |
| Costa Mesa | Orange | 949 |
| Covina | Los Angeles | 626 |
| Culver City | Los Angeles | 310/424 |
| Cupertino | Santa Clara | 408/669 |
| Cypress | Orange | 714/657 |
| Daly City | San Mateo | 650 |
| Dana Point | Orange | 949 |
| Danville | Contra Costa | 925 |
| Davis | Yolo | 530 |
| Delano | Kern | 661 |
| Diamond Bar | Los Angeles | 909/840 |
| Downey | Los Angeles | 562 |
| Dublin | Alameda | 925 |
| East Los Angeles | Los Angeles | 323/213/738 |
| El Cajon | San Diego | 619/858 |
| El Centro | Imperial | 760/442 |
| El Dorado Hills | El Dorado | 916/279 |
| El Monte | Los Angeles | 626 |
| Elk Grove | Sacramento | 916/279 |
| Encinitas | San Diego | 760/442 |
| Escondido | San Diego | 760/442 |
| Fair Oaks | Sacramento | 916/279 |
| Fairfield | Solano | 707/369 |
| Fallbrook | San Diego | 760/442 |
| Florence-Graham | Los Angeles | 323/213/738 |
| Folsom | Sacramento | 916/279 |
| Fontana | San Bernardino | 909/840 |
| Fountain Valley | Orange | 714/657 |
| Fremont | Alameda | 510/341 |
| Fresno | Fresno | 559 |
| Fullerton | Orange | 714/657 |
| Garden Grove | Orange | 714/657 |
| Gardena | Los Angeles | 310/424 |
| Gilroy | Santa Clara | 408/669 |
| Glendale | Los Angeles | 818/747 |
| Glendora | Los Angeles | 626 |
| Goleta | Santa Barbara | 805/820 |
| Hacienda Heights | Los Angeles | 626 |
| Hanford | Kings | 559 |
| Hawthorne | Los Angeles | 310/424 |
| Hayward | Alameda | 510/341 |
| Hemet | Riverside | 951 |
| Hesperia | San Bernardino | 760/442 |
| Highland | San Bernardino | 909/840 |
| Hollister | San Benito | 831 |
| Huntington Beach | Orange | 714/657 |
| Huntington Park | Los Angeles | 323/213/738 |
| Indio | Riverside | 760/442 |
| Inglewood | Los Angeles | 310/424 |
| Irvine | Orange | 949 |
| Jurupa Valley | Riverside | 951 |
| La Habra | Orange | 562 |
| La Mesa | San Diego | 619/858 |
| La Mirada | Los Angeles | 714/657 |
| La Puente | Los Angeles | 626 |
| La Quinta | Riverside | 760/442 |
| La Verne | Los Angeles | 909/840 |
| Laguna Hills | Orange | 949 |
| Laguna Niguel | Orange | 949 |
| Lake Elsinore | Riverside | 951 |
| Lake Forest | Orange | 949 |
| Lakewood | Los Angeles | 562 |
| Lancaster | Los Angeles | 661 |
| Lawndale | Los Angeles | 310/424 |
| Lincoln | Placer | 916/279 |
| Livermore | Alameda | 925 |
| Lodi | San Joaquin | 209/350 |
| Lompoc | Santa Barbara | 805/820 |
| Long Beach | Los Angeles | 562 |
| Los Altos | Santa Clara | 650 |
| Los Angeles | Los Angeles | 323/213/738 |
| Los Banos | Merced | 209/350 |
| Los Gatos | Santa Clara | 408/669 |
| Lynwood | Los Angeles | 310/424 |
| Madera | Madera | 559 |
| Manhattan Beach | Los Angeles | 310/424 |
| Manteca | San Joaquin | 209/350 |
| Martinez | Contra Costa | 925 |
| Menifee | Riverside | 951 |
| Menlo Park | San Mateo | 650 |
| Merced | Merced | 209/350 |
| Milpitas | Santa Clara | 408/669 |
| Mission Viejo | Orange | 949 |
| Modesto | Stanislaus | 209/350 |
| Monrovia | Los Angeles | 626 |
| Montclair | San Bernardino | 909/840 |
| Montebello | Los Angeles | 323/213/738 |
| Monterey Park | Los Angeles | 626 |
| Moorpark | Ventura | 805/820 |
| Moreno Valley | Riverside | 951 |
| Morgan Hill | Santa Clara | 408/669 |
| Mountain View | Santa Clara | 650 |
| Murrieta | Riverside | 951 |
| Napa | Napa | 707/369 |
| National City | San Diego | 619/858 |
| Newark | Alameda | 510/341 |
| Newport Beach | Orange | 949 |
| North Highlands | Sacramento | 916/279 |
| Norwalk | Los Angeles | 562 |
| Novato | Marin | 415/628 |
| Oakland | Alameda | 510/341 |
| Oakley | Contra Costa | 925 |
| Oceanside | San Diego | 760/442 |
| Ontario | San Bernardino | 909/840 |
| Orange | Orange | 714/657 |
| Orangevale | Sacramento | 916/279 |
| Oxnard | Ventura | 805/820 |
| Pacifica | San Mateo | 650 |
| Palm Desert | Riverside | 760/442 |
| Palm Springs | Riverside | 760/442 |
| Palmdale | Los Angeles | 661 |
| Palo Alto | Santa Clara | 650 |
| Paramount | Los Angeles | 562 |
| Pasadena | Los Angeles | 626 |
| Paso Robles | San Luis Obispo | 805/820 |
| Perris | Riverside | 951 |
| Petaluma | Sonoma | 707/369 |
| Pico Rivera | Los Angeles | 562 |
| Pittsburg | Contra Costa | 925 |
| Placentia | Orange | 714/657 |
| Pleasant Hill | Contra Costa | 925 |
| Pleasanton | Alameda | 925 |
| Pomona | Los Angeles | 909/840 |
| Porterville | Tulare | 559 |
| Poway | San Diego | 619/858 |
| Rancho Cordova | Sacramento | 916/279 |
| Rancho Cucamonga | San Bernardino | 909/840 |
| Rancho Palos Verdes | Los Angeles | 310/424 |
| Rancho Santa Margarita | Orange | 949 |
| Redding | Shasta | 530 |
| Redlands | San Bernardino | 909/840 |
| Redondo Beach | Los Angeles | 310/424 |
| Redwood City | San Mateo | 650 |
| Rialto | San Bernardino | 909/840 |
| Richmond | Contra Costa | 510/341 |
| Riverside | Riverside | 951 |
| Rocklin | Placer | 916/279 |
| Rohnert Park | Sonoma | 707/369 |
| Rosemead | Los Angeles | 626 |
| Roseville | Placer | 916/279 |
| Rowland Heights | Los Angeles | 626 |
| Sacramento | Sacramento | 916/279 |
| Salinas | Monterey | 831 |
| San Bernardino | San Bernardino | 909/840 |
| San Bruno | San Mateo | 650 |
| San Carlos | San Mateo | 650 |
| San Clemente | Orange | 949 |
| San Diego | San Diego | 619/858 |
| San Dimas | Los Angeles | 909/840 |
| San Francisco | San Francisco | 415/628 |
| San Gabriel | Los Angeles | 626 |
| San Jacinto | Riverside | 951 |
| San Jose | Santa Clara | 408/669 |
| San Juan Capistrano | Orange | 949 |
| San Leandro | Alameda | 510/341 |
| San Luis Obispo | San Luis Obispo | 805/820 |
| San Marcos | San Diego | 760/442 |
| San Mateo | San Mateo | 650 |
| San Pablo | Contra Costa | 510/341 |
| San Rafael | Marin | 415/628 |
| San Ramon | Contra Costa | 925 |
| Santa Ana | Orange | 714/657 |
| Santa Barbara | Santa Barbara | 805/820 |
| Santa Clara | Santa Clara | 408/669 |
| Santa Clarita | Los Angeles | 661 |
| Santa Cruz | Santa Cruz | 831 |
| Santa Maria | Santa Barbara | 805/820 |
| Santa Monica | Los Angeles | 310/424 |
| Santa Rosa | Sonoma | 707/369 |
| Santee | San Diego | 619/858 |
| Saratoga | Santa Clara | 408/669 |
| Seaside | Monterey | 831 |
| Simi Valley | Ventura | 805/820 |
| South Gate | Los Angeles | 323/213/738 |
| South San Francisco | San Mateo | 650 |
| Stanton | Orange | 714/657 |
| Stockton | San Joaquin | 209/350 |
| Sunnyvale | Santa Clara | 408/669 |
| Temecula | Riverside | 951 |
| Temple City | Los Angeles | 626 |
| Thousand Oaks | Ventura | 805/820 |
| Torrance | Los Angeles | 310/424 |
| Tracy | San Joaquin | 209/350 |
| Tulare | Tulare | 559 |
| Turlock | Stanislaus | 209/350 |
| Tustin | Orange | 714/657 |
| Union City | Alameda | 510/341 |
| Upland | San Bernardino | 909/840 |
| Vacaville | Solano | 707/369 |
| Vallejo | Solano | 707/369 |
| Ventura | Ventura | 805/820 |
| Victorville | San Bernardino | 760/442 |
| Visalia | Tulare | 559 |
| Vista | San Diego | 760/442 |
| Walnut Creek | Contra Costa | 925 |
| Watsonville | Santa Cruz | 831 |
| West Covina | Los Angeles | 626 |
| West Hollywood | Los Angeles | 323/213/738 |
| West Sacramento | Yolo | 916/279 |
| Westminster | Orange | 714/657 |
| Westmont | Los Angeles | 323/213/738 |
| Whittier | Los Angeles | 562 |
| Wildomar | Riverside | 951 |
| Woodland | Yolo | 530 |
| Yorba Linda | Orange | 714/657 |
| Yuba City | Sutter | 530 |
| Yucaipa | San Bernardino | 909/840 |