Where is Area Code 510? | Oakland, Fremont, & Hayward, …
Cities Located in the 510 Area Code. The most populous cities in area code 510 are: Oakland, Fremont, Hayward, San Francisco, and Berkeley. Other cities in the 510 area code include: Richmond, Union City, El Sobrante, San Leandro, Hercules, Alameda, Albany, Castro Valley, Crockett, San Jose, Walnut Creek, and Sunnyvale.
DA: 96 PA: 95 MOZ Rank: 46