California Area Codes: Regions, 10-Digit Dialing, and Moves

California has 40 active telephone area codes, more than any other state, covering everything from downtown Los Angeles to the far northern coast. Many regions now share two or three codes layered on top of the same territory, an arrangement called an overlay, which is why 10-digit dialing is mandatory across most of the state. The full list of California area codes, grouped by region, is below.

Every California Area Code by Region

Where two or three codes share the same geographic territory, they’re listed together. The cities shown are the largest or most recognizable in each zone, not a complete list.

Greater Los Angeles and the Inland Empire

  • 213 / 323 / 738 — Downtown Los Angeles, South LA, Koreatown
  • 310 / 424 — West LA, Santa Monica, Torrance, Inglewood, Manhattan Beach
  • 562 — Long Beach, Lakewood, Downey, Whittier, Norwalk
  • 626 — San Gabriel Valley: Pasadena, Arcadia, West Covina, Alhambra
  • 661 — Antelope Valley, Bakersfield, Santa Clarita, Palmdale, Lancaster
  • 818 / 747 — San Fernando Valley: Burbank, Glendale, Encino, Van Nuys
  • 909 / 840 — Western Inland Empire: San Bernardino, Ontario, Pomona, Rancho Cucamonga
  • 951 — Southern Inland Empire: Riverside, Corona, Temecula, Moreno Valley

San Diego and Orange County

  • 619 / 858 — San Diego, La Jolla, El Cajon, Chula Vista, Poway
  • 714 / 657 — Northern Orange County: Anaheim, Santa Ana, Fullerton, Huntington Beach, Garden Grove
  • 760 / 442 — North San Diego County and desert areas: Oceanside, Escondido, Palm Springs, Victorville
  • 949 — South Orange County: Irvine, Newport Beach, Laguna Beach, Mission Viejo, San Clemente

Central Coast and Central Valley

  • 209 / 350 — Northern Central Valley: Stockton, Modesto, Merced, Tracy, Manteca
  • 559 / 357 — Southern Central Valley: Fresno, Visalia, Madera, Clovis, Hanford
  • 805 / 820 — Central Coast: Santa Barbara, San Luis Obispo, Ventura, Thousand Oaks, Camarillo
  • 831 — Monterey Bay area: Salinas, Santa Cruz, Monterey, Watsonville, Hollister

San Francisco Bay Area

  • 408 / 669 — San Jose, Sunnyvale, Santa Clara, Cupertino, Milpitas
  • 415 / 628 — San Francisco and Marin County: San Rafael, Novato, Mill Valley
  • 510 / 341 — East Bay: Oakland, Berkeley, Fremont, Hayward, Richmond
  • 650 — Peninsula: San Mateo, Palo Alto, Redwood City, Daly City, Menlo Park
  • 707 / 369 — North Bay and North Coast: Santa Rosa, Napa, Vallejo, Eureka, Ukiah
  • 925 — Contra Costa County and Tri-Valley: Concord, Walnut Creek, Pleasanton, Livermore, Antioch

Northern California and the Sierra Nevada

  • 530 / 837 — Northeastern California: Chico, Redding, Davis, South Lake Tahoe, Yuba City, Truckee, Paradise
  • 916 / 279 — Sacramento metro: Sacramento, Elk Grove, Roseville, Folsom, Citrus Heights

The 357 overlay for the 559 region is the newest addition, becoming available for new number assignments after 559 exhausted its available prefixes in late 2025.1California Public Utilities Commission. 559/357 Area Codes2California Public Utilities Commission. CPUC Reminds Consumers of the New 837 Area Code Coming to the 530 Region3California Public Utilities Commission. New 738 Area Code Coming to the 213/323 Region

Why 10-Digit Dialing Is Required in Most of California

If you live anywhere in California where two or more area codes share the same region, you must dial the full 10-digit number for every call, even calls to a neighbor with the same area code. This applies to landlines, cell phones, and business phone systems alike. Dialing just seven digits will not connect the call.4California Public Utilities Commission. Area Codes and Numbering

Ten-digit dialing also became mandatory in nine California area codes because of the national 988 Suicide and Crisis Lifeline. The FCC designated 988 as a three-digit dialing code in 2020, which created a routing conflict in any area code that already used 988 as a local prefix. Those nine codes — 209, 530, 562, 626, 650, 707, 925, 949, and 951 — had to transition to 10-digit dialing so that someone dialing 9-8-8 would reach the crisis line rather than a local number.5Federal Communications Commission. Area Codes Required to Transition to 10-Digit Dialing

Area Codes Coming Soon

Two more California area codes are heading toward exhaustion. The 714/657 complex in northern Orange County is projected to run out of assignable prefixes in early 2027, and the CPUC has already approved a new overlay to handle it. Once activated, a third area code will be layered on top of the Anaheim, Santa Ana, and Fullerton region.6California Public Utilities Commission. 657/714 NPA Relief Decision The 949 area code serving south Orange County is also projected to exhaust within the next few years, though no formal relief decision has been issued yet.7North American Numbering Plan Administrator. 2024 NANPA Annual Report

If you’re in one of these regions, your existing phone number stays exactly the same when a new overlay arrives. The only people who get the new area code are those requesting new service or an additional line after it launches. The CPUC runs a public notification period, typically several months, before mandatory 10-digit dialing takes effect in any area that didn’t already have it.

Keeping a California Area Code After You Move

Federal law gives you the right to keep your phone number when you switch carriers. This is called number portability, and the transfer typically takes one business day for wireless numbers.8eCFR. 47 CFR Part 52 Subpart C – Number Portability Moving to a different part of California, or out of state, is a different question. You can usually keep a 916 cell number after relocating from Sacramento to San Diego because wireless carriers aren’t bound by area code boundaries the way landlines are. Porting a landline to a new location outside the original area code region may not be available.9Federal Communications Commission. Porting – Keeping Your Phone Number When You Change Providers

In practice, millions of Californians carry area codes that no longer match where they live. That’s normal and has no effect on service, billing, or call quality. An area code tells you where a number was first issued, not where its owner is sitting today.