510 Area Code: Cities, Time Zone and Zip Codes
The area code 510 is in California and it serves Oakland, Fremont, Hayward, Berkeley, Richmond, San Leandro, Alameda, Union City, and some other surrounding cities. The area code 510 was created on April 25, 1990 and was first put to use on September 2, 1991. The top counties being served by the 510 area code are Alameda County, and Contra Costa County.
DA: 91 PA: 67 MOZ Rank: 38