40 area codes serving California

Area codes in California

California is served by 40 active geographic area codes in the North American Numbering Plan. These codes were assigned between 1947 and 2025 as population and call demand grew across the state.

Across California's 40 area codes, our data counts 21,929 assigned central-office (NXX) prefixes in service. The most heavily loaded is 213 (Los Angeles), with about 99% of its ~792 usable prefixes assigned, and 19 of the state's codes sit at 90%+ capacity — which is why overlay codes keep being added. See the full NXX prefix allocation analysis across US area codes. (Prefix data: localcallingguide.com / NANPA, 2026.)

Time zones in California

All area codes in California fall in the PT time zone.

• PT — area codes: 209, 213, 279, 310, 323, 341, 350, 357, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 738, 747, 760, 805, 818, 820, 831, 837, 840, 858, 909, 916, 925, 949, 951

Top metros and their area codes

Below are the primary cities in California and the area codes that serve each metro. Cities with multiple codes share geography due to overlay assignments added as demand grew.

• Anaheim — 657 , 714
• Bakersfield — 661
• Fresno — 357 , 559
• Irvine — 949
• Long Beach — 562
• Los Angeles — 213 , 310 , 323 , 424 , 738 , 747 , 818
• Oakland — 341 , 510
• Oxnard — 805
• Palm Springs — 442 , 760
• Palo Alto — 650
• Pasadena — 626
• Redding — 530 , 837
• Riverside — 951
• Sacramento — 279 , 916
• Salinas — 831
• San Bernardino — 840 , 909
• San Diego — 619 , 858
• San Francisco — 415 , 628
• San Jose — 408 , 669
• San Luis Obispo — 820
• Santa Rosa — 707
• Stockton — 209 , 350
• Walnut Creek — 925

California area code coverage by region

This regional breakdown maps each California area code to the part of the state it serves. California's codes split across 28 regions — pick the code that matches the area you want to reach.

• Central Coast California — area code: 820 (San Luis Obispo)
• Central Los Angeles — area codes: 213, 738 (Los Angeles)
• Central Valley — area codes: 209, 350 (Stockton)
• East Bay (Alameda/Contra Costa) — area codes: 341, 510 (Oakland)
• East Bay Inland (Contra Costa / SE Alameda) — area code: 925 (Walnut Creek)
• Inland Empire Desert — area code: 442 (Palm Springs)
• Inland Empire Desert and Eastern California — area code: 760 (Palm Springs)
• Inland Empire West — area codes: 840, 909 (San Bernardino)
• Monterey Bay Area — area code: 831 (Salinas)
• North Los Angeles County / Kern County — area code: 661 (Bakersfield)
• Northeastern California — area codes: 530, 837 (Redding)
• Northern Orange County — area codes: 657, 714 (Anaheim)
• Northwestern California — area code: 707 (Santa Rosa)
• Riverside County — area code: 951 (Riverside)
• Sacramento Metro — area codes: 279, 916 (Sacramento)
• San Diego Metro — area code: 619 (San Diego)
• San Diego North County — area code: 858 (San Diego)
• San Fernando Valley — area codes: 747, 818 (Los Angeles)
• San Francisco and Marin County — area codes: 415, 628 (San Francisco)
• San Gabriel Valley — area code: 626 (Pasadena)
• San Joaquin Valley — area codes: 357, 559 (Fresno)
• San Mateo County / Peninsula — area code: 650 (Palo Alto)
• Silicon Valley South — area codes: 408, 669 (San Jose)
• South Orange County — area code: 949 (Irvine)
• South/Central Los Angeles — area code: 323 (Los Angeles)
• Southeastern LA County — area code: 562 (Long Beach)
• Ventura County and Central Coast California — area code: 805 (Oxnard)
• West LA and South Bay — area codes: 310, 424 (Los Angeles)

Why get a local California number?

A California area code number gives your business three core advantages:

• Local trust signal. Customers in California recognize local area codes as their own. A familiar caller ID builds immediate credibility for service businesses, sales teams, and patient communication.
• Higher answer rate. Calls from a local area code are answered far more often than toll-free or out-of-area numbers — industry data puts the lift at 20–40%. That difference matters most for outbound sales, appointment confirmations, and service callbacks.
• Targeted marketing. Advertising a local California number on print, radio, digital, and outdoor channels converts better than a national 800 number for audiences who prefer doing business locally.

How to get a California area code number with DialPhone

Setting up a California business number takes under 10 minutes:

1. Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
2. Search available California numbers. Filter the DialPhone number inventory by state, area code, city, or number pattern.
3. Choose your number and configure. Assign your new California number to a user or team, configure call routing, voicemail, AI receptionist, and business SMS.
4. Port your existing number (optional). Already have a California number? Free number porting completes in 2 to 5 business days with zero service interruption.