All 39 California Area Codes
Every active code: tap any card for its full guide, who called, cities and ZIPs, map, spam patterns and local time.
Got a call from a California number you don’t recognize?Open that code’s guide above for its full prefix lookup. AT&T ActiveArmor® blocks spam automatically, included with AT&T wireless plans.
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Included with AT&T wireless plans. Requires compatible device/service and download of the AT&T ActiveArmor® app. Other terms & restrictions apply. May not detect all threats and may block wanted calls. Some features require Advanced mobile security ($7/mo.). See terms.
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Offer details
Service good for 30 days. Data: Limited to 100GB of data and 25GB of hotspot data. No additional data is available after limit is reached. Video is limited to SD quality. Talk & Text: Includes unlimited talk & text within the U.S. and unlimited text from the U.S. to over 230 countries. Limits: One trial per user. An unlocked, dual eSIM iPhone is required. You’ll receive a trial phone number that belongs to AT&T and is not available to be ported to another carrier or otherwise retained. Trial plan features and details may differ from or be unavailable in other AT&T plans. U.S. only. All terms subject to change at any time.
Why Metro Los Angeles Has 6 Area Codes
When a region uses more numbers than one code can hold, new codes are overlaid on the same territory rather than forcing anyone to change numbers. Metro Los Angeles now uses 310, 424, 657, 714, 747 and 818: same neighborhoods, ten-digit dialing, and every one of them covered by its own guide above.
California Area Codes by City
The largest California communities and the area codes that serve them. Every city links to its local AT&T internet page.
How California Got Its Codes
Every California area code, in the order it entered service. Splits carved new regions; added codes overlay existing ones, which is why ten-digit dialing is standard.
| In service | Code | How it arrived |
|---|---|---|
| 1947 | 213 | One of the original area codes of 1947 |
| 1947 | 415 | One of the original area codes of 1947 |
| 1947 | 916 | One of the original area codes of 1947 |
| 1951 | 714 | Added to the 213 region |
| 1957 | 805 | Added to the 213 region |
| 1958 | 209 | Added to the 415 region |
| 1959 | 408 | Added to the 415 region |
| 1959 | 707 | Added to the 415 region |
| 1982 | 619 | Added to the 714 region |
| 1984 | 818 | Added to the 213 region |
| 1991 | 310 | Added to the 213 region |
| 1991 | 510 | Added to the 415 region |
| 1992 | 909 | Added to the 714 region |
| 1997 | 530 | Added to the 916 region |
| 1997 | 562 | Split from 310 |
| 1997 | 626 | Split from 818 |
| 1997 | 650 | Split from 415 |
| 1997 | 760 | Added to the 619 region |
| 1998 | 323 | Added to the 213 region |
| 1998 | 559 | Added to the 209 region |
| 1998 | 831 | Split from 408 |
| 1998 | 925 | Split from 510 |
| 1998 | 949 | Split from 714 |
| 1999 | 661 | Split from 805 |
| 1999 | 858 | Added to the 619 region |
| 2004 | 951 | Split from 909 |
| 2006 | 424 | Added to the 310 region |
| 2008 | 657 | Added to the 714 region |
| 2009 | 442 | Added to the 760 region |
| 2009 | 747 | Added to the 818 region |
| 2012 | 669 | Added to the 408 region |
| 2015 | 628 | Added to the 415 region |
| 2018 | 279 | Added to the 916 region |
| 2018 | 820 | Added to the 805 region |
| 2019 | 341 | Added to the 510 region |
| 2021 | 840 | Added to the 909 region |
| 2022 | 350 | Added to the 209 region |
| 2023 | 369 | Added to the 707 region |
| 2024 | 738 | Added to the 323 region |
Source: NANPA NPA database, July 2026. Regenerated monthly.
California Area Code Map
Every active California area code at a glance, anchored to the metro each one serves. Tap any code above for its detailed coverage map.
Explore the interactive map
Click any region to open that area code's full guide. Hover for county names.
Open the printable California area code map (PDF) - poster format with a QR code back to this page.
Internet, wireless & stores across the state
AT&T Home Internet in California
AT&T home internet is available across California, checked address by address; every area code guide above lists its cities and what’s offered there.
AT&T Fiber: Ltd. avail/areas. Speeds based on wired connection. Actual speeds vary. For 5-GIG, single device wired speed maximum 4.7Gbps. For more info., visit att.com/speed101.
Start with home internet in California, or pair it with wireless in an internet + wireless bundle.
AT&T Wireless in California
AT&T’s 5G network covers most of California. ActiveArmor® spam blocking is included with every unlimited plan, your number stays yours when you move between California codes, and great cell phone deals in California are a tap away.
AT&T may temporarily slow data speeds if the network is busy. 5G req’s compatible plan & device. Coverage not available everywhere. Learn more at att.com/5Gforyou.
AT&T Stores Across California
From the San Diego metro to Fresno, Los Angeles and beyond, walk in for switching, porting, upgrades and hands-on help. Every area code guide lists its nearest stores.
Find stores in: San Diego · Fresno · Los Angeles · Bakersfield · San Jose
