California Area Codes: Complete List of All 37 Codes
California has 37 active area codes serving its massive population across diverse regions. From the Los Angeles area codes (213, 310, 323, 424, 747, 818) to San Francisco area codes (415, 628) and beyond, each code represents a specific geographic zone in the Golden State. Whether you’re setting up a new number, verifying a call, or exploring California’s telecommunications landscape, this guide covers every area code with city coverage and recent updates.
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Complete List of California Area Codes (Updated 2025)
California currently has 37 active area codes assigned by the North American Numbering Plan (NANP). Here are all California area codes:
209, 213, 279, 310, 323, 341, 350, 369, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 747, 760, 805, 818, 820, 831, 840, 858, 909, 916, 925, 949, 951.
Based on the latest NANPA and California Public Utilities Commission (CPUC) updates for 2025.
Southern California Area Codes
Los Angeles Area Codes
The Los Angeles area codes include 213, 310, 323, 424, 747, and 818. This is the largest concentration of codes in California due to LA’s massive population and business demand.
- 213: Downtown Los Angeles, original code since 1947
- 310: Western and southwestern LA County (Santa Monica, Malibu, Torrance, Beverly Hills)
- 323: Central and eastern LA City (overlay to 213, added 1998)
- 424: Overlay to 310, introduced 2006
- 747: Overlay to 818, added 2009
- 818: San Fernando Valley (Burbank, Glendale, Van Nuys)
Other Southern California Codes
- 619 area code: San Diego (original code since 1982)
- 858 area code: San Diego overlay (North County, introduced 1999)
- 626: San Gabriel Valley (Pasadena, El Monte, West Covina)
- 657: Orange County overlay to 714, added 2008
- 714: Orange County (Anaheim, Huntington Beach, Santa Ana)
- 909: San Bernardino, Riverside (original since 1992)
- 840: San Bernardino overlay, added 2021
- 760: Inland Empire and desert regions (Palm Springs, Victorville, Barstow)
- 442: 760 overlay, added 2009
- 805: Central Coast (Santa Barbara, Ventura, San Luis Obispo)
- 820: 805 overlay, added 2018
- 661: Bakersfield and Kern County
Northern California Area Codes
San Francisco Area Codes
- 415: San Francisco, Marin County (original code since 1947)
- 628: San Francisco overlay (introduced 2015)
Bay Area and Northern Region
- 408: San Jose, Santa Clara Valley (original since 1959)
- 669: 408 overlay, added 2012
- 510: Oakland, East Bay (Fremont, Hayward, Berkeley)
- 341: 510 overlay, added 2019
- 650: San Mateo, Palo Alto, Peninsula (1997)
- 707: North Bay (Santa Rosa, Eureka, Napa, Petaluma)
- 831: Monterey, Santa Cruz, Central Coast (1998)
Central California Area Codes
- 916: Sacramento, Northern Valley (original, 1947)
- 279: Sacramento overlay, added 2018
- 530: Redding, Chico, Lake Tahoe, Northern Sierra (1997)
- 559: Fresno, Visalia, San Joaquin Valley (1998)
- 209: Stockton, Modesto, Merced (1958)
- 350: 209 overlay, added 2022
Understanding Overlays and Splits
California uses both overlays and splits to manage area code demand.
Overlay: A new code serves the same region as an existing code. Example: 628 overlays 415 in San Francisco. No customer numbers change, but 10-digit dialing becomes mandatory.
Split: A region is divided into two zones with separate codes.
Result: All of California now requires 10-digit dialing (area code + 7-digit number) for all local calls.
Dialing Rules for California
Local calls: Dial area code + 7-digit number (10 digits total)
Long distance: Dial 1 + area code + 7-digit number
International: Dial +1 + area code + 7-digit number
This mandatory 10-digit dialing applies throughout California due to overlays and the national 988 suicide prevention line.
How to Find a California Area Code
Use these methods to identify any California area code:
- Search by city name on area code lookup sites
- Reverse lookup for unknown phone numbers
- Check CPUC or NANPA databases for official information
- Verify caller locations and carrier information
For suspicious calls using 213, 310, 415, or 619 area codes, always verify the caller’s identity before sharing personal information.
Common Questions About California Area Codes
Q: What are the Los Angeles area codes?
Los Angeles uses 213, 310, 323, 424, 747, and 818.
Q: What is the 619 area code?
619 is San Diego’s original area code, serving the city and surrounding areas since 1982.
Q: What is the 415 area code?
415 is San Francisco’s original code since 1947, covering San Francisco and Marin County.
Q: Why does California have so many area codes?
California’s large population, business growth, and mobile phone demand require multiple codes to prevent number shortages.
Q: Do cell phones keep their area code when moving?
Yes, mobile numbers retain their original area code even when the customer relocates.
California Public Utilities Commission Updates
The California Public Utilities Commission (CPUC) oversees all area code decisions, including new overlays, splits, and relief plans. Recent additions include:
- 350 overlaying 209 (2022)
- 279 overlaying 916 (2018)
- 820 overlaying 805 (2018)
The CPUC monitors number exhaustion forecasts and approves new codes when necessary. Visit cpuc.ca.gov for official announcements and service area maps.
Future California Area Codes
As California’s population continues growing, additional area codes will be introduced. The CPUC regularly forecasts number availability and plans new overlays before exhaustion occurs. Staying informed through official CPUC updates ensures you’re aware of upcoming changes that may affect dialing practices or number availability.
Quick Reference Table
| Region | Area Codes | Major Cities |
|---|---|---|
| Los Angeles | 213, 310, 323, 424, 747, 818 | LA, Santa Monica, Burbank, Van Nuys |
| San Diego | 619, 858 | San Diego, Oceanside |
| Orange County | 657, 714 | Anaheim, Huntington Beach, Santa Ana |
| San Francisco Bay | 408, 415, 510, 628, 650, 669 | San Jose, San Francisco, Oakland, Palo Alto |
| Sacramento | 279, 916 | Sacramento, Folsom, Roseville |
| Fresno/Central Valley | 209, 350, 559 | Fresno, Visalia, Stockton, Modesto |
References and Sources
- California Public Utilities Commission (CPUC)
- North American Numbering Plan Administrator (NANPA)
- Federal Communications Commission (FCC)