Area Code 510

Country United States
State/Province California 
Major City Oakland 
Easy URL 

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510 Area Code is an area code finder with detailed information on the 510 area code including 510 area code map.

Major cities like Alameda within area code 510 are also listed on this page. More area codes, including those outside of California, are found on the homepage.

Some telephone area codes are overlaid, requiring 10-digit dialing. is your one-stop site for area code lookup, area code search, and area code locator.

Area Code 510 Detail

The eastern Bay Area cities of Alameda County, California, are served by area code 510. If you hear the East Bay referred to as “the nickel and dime,” it is a reference to the 510 area code. 510 was created in a split of area code 415 in 1991.

510 Area Code Location
Major Cities County State/Province
Alameda  Alameda  CA 
Berkeley  Alameda  CA 
Castro Valley  Alameda  CA 
Fremont  Alameda  CA 
Hayward  Alameda  CA 
Oakland  Alameda  CA 
Richmond  Contra Costa  CA 
Other Cities By Name
El Cerrito  Contra Costa  CA 
Hercules  Contra Costa  CA 
Piedmont  Alameda  CA 
Pinole  Contra Costa  CA 
San Leandro  Alameda  CA 
Union City  Alameda  CA 

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