Quick answer: California has roughly 39 active area codes in 2026, more than any other state. They cluster across 11 regions, from 213/323 in downtown LA to 415/628 in San Francisco, 408/669 in Silicon Valley, 619/858 in San Diego, and 916/279 in Sacramento. Most regions now use overlays (a second code sitting on top of the original), so 10-digit dialing is mandatory statewide — even for local calls.
California area codes: the complete list by region
California uses more area codes than any other state, and the count keeps climbing. As of 2026, the Golden State is served by roughly 39 active codes, with new overlays added almost every year to keep up with demand.
That makes "which code should I use?" a real question for any business setting up a local presence. This guide gives you the full regional list, explains why so many codes exist, and shows how to pick one that fits your market.
We built it as a clean reference, so skim the table or read the regional notes, whichever you need.
Why California has so many codes
California's population and business density mean phone numbers get used up fast. Every region eventually runs short.
When that happens, regulators add a new code rather than re-splitting the map. The result is a dense patchwork of overlapping codes.
The 10-digit dialing rule
Because overlays put multiple codes in one region, every call needs the full ten digits. You always dial the area code, even for a neighbor.
This is standard statewide now and applies to local and long-distance calls alike.
The complete California area code list
Here is the full set of active codes, grouped by region. Codes marked "overlay" share their geography with an older code.
| Region | Area codes |
|---|---|
| Los Angeles County | 213, 323, 310, 424, 818, 747, 661, 820, 840 |
| San Francisco / Peninsula | 415, 628, 650 |
| East Bay | 510, 341 |
| South Bay / Silicon Valley | 408, 669 |
| North Bay and nearby | 707, 369, 925 |
| San Diego County | 619, 858 |
| Orange County | 714, 657, 949 |
| Inland Empire | 909, 951, 840 |
| Sacramento Region | 916, 279 |
| Central Valley | 209, 350, 559, 530 |
| Central Coast and Desert | 805, 820, 831, 760, 442 |
Counts and codes are accurate as of 2026. Regulators add overlays regularly, so a new code may appear in fast-growing regions.
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Los Angeles: the most recognizable prefixes
LA County alone uses nearly a dozen codes. A few carry real brand weight.
213 and 323 — Central and downtown LA
The 213 prefix covers downtown and is tied to finance, law, and corporate headquarters. The 323 code wraps the surrounding central neighborhoods.
Both signal an established, urban LA presence.
310 and 424 — West LA and the coast
The 310 code spans Beverly Hills, Santa Monica, and the affluent Westside. It carries strong associations with entertainment and luxury.
Its overlay, 424, covers the exact same area for newer lines.
818 and 747 — San Fernando Valley
The 818 prefix is the Valley's signature code, home to film and TV production. The 747 overlay shares that footprint.
San Francisco Bay Area: tech country
The Bay Area's codes are among the most sought-after in the state, thanks to the region's tech economy.
415 and 628 — San Francisco
The 415 code is San Francisco's original prefix and a recognized badge for startups and finance. The 628 overlay now serves the same city.
408 and 669 — Silicon Valley
The 408 prefix covers San Jose and the South Bay, the literal heart of Silicon Valley. Its overlay is 669.
510 and 650 — East Bay and Peninsula
The 510 code (with overlay 341) covers Oakland and Berkeley. The 650 prefix runs down the Peninsula through Palo Alto.
If a Bay Area number fits your market, MCM can check live availability across all of these codes. The search takes about two minutes and needs no signup.
San Diego, Orange County, and Sacramento
Beyond LA and the Bay, three more regions anchor the state's business activity.
San Diego — 619 and 858
The 619 prefix covers central San Diego, with 858 as the overlay reaching the northern parts of the county.
Orange County — 714, 657, and 949
The 714 code (overlay 657) covers Anaheim and North County. The 949 prefix serves Irvine and South County.
Sacramento — 916 and 279
The state capital uses 916, with 279 as its overlay. These codes lean toward government, legal, and healthcare.
The rest of the state
California's other regions carry their own identities, even without the headline recognition.
The 707 code covers Wine Country, including Napa and Sonoma. The 805 prefix spans the Central Coast around Santa Barbara.
The Central Valley relies on 209, 559, 530, and the newer 350, while the Inland Empire uses 909, 951, and 840.
How to choose the right code for your business
A code is more than digits. It tells customers where you stand.
Match the code to your market
Pick a code that matches where your customers are. A local prefix lifts answer rates because people recognize and trust it.
A tech startup might want a 415, while an entertainment firm leans toward a 213.
Original code or overlay?
Some businesses prefer an original code for perceived prestige. In practice, the functional difference is zero.
As overlays spread, the distinction fades. Consistent service shapes your reputation far more than the prefix.
Availability and flexibility
Your first-choice code may be tapped out. Adjacent codes, overlays, or vanity numbers are all solid fallbacks.
With VoIP, you are not tied to one location. You can hold a San Diego and a San Francisco number at once and route both to the same team.
Want this list as a sortable reference with availability flags? MCM can pull current inventory for any code, so you compare options side by side before deciding.
Final thoughts
California's web of area codes can look overwhelming, but the logic is simple: pick the region your customers live in, then choose any active code that serves it. The prefix sets the first impression; your service does the rest.
Start by deciding which market matters most, check which codes are available there, and route a number to your team wherever they work.
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FAQs
How many area codes does California have in 2026?
California has roughly 39 active area codes as of 2026. The exact count shifts as regulators add new overlays to fast-growing regions.
What is the difference between an original code and an overlay?
An original code came first for a region. An overlay is a newer code added on top of the same geography once numbers run low. Functionally they work identically.
Why do I have to dial 10 digits in California?
Because overlays place multiple codes in one region, every call needs the full area code plus number. This applies to local and long-distance calls statewide.
Can I get a California number if my business is in another state?
Yes. A VoIP provider can assign you a virtual California number from any region and route calls to your existing devices, no physical office required.
Which California area code is best for a business?
The best code is the one matching your target market. A local prefix builds trust and improves answer rates with customers in that region.
Are new California area codes still being added?
Yes. California's population and business growth keep exhausting number supplies, so regulators continue introducing overlay codes in busy areas.
Get a California number for your business
A California presence used to mean opening an office in LA or San Francisco. Now it's a few-minute signup.
My Country Mobile offers California virtual numbers across every active code, with call forwarding, voicemail-to-email, SMS, and AI call transcription. Calls route to any device worldwide, and over 17,500 businesses already trust MCM with their virtual phone presence.
