| Country | United States |
| State/Province | California |
| Major City | Oakland |
| Time Zone | Pacific (UTC-08:00) |
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.
