510 area code is a telephone area code in the North American Numbering Plan (NANP) for East Bay cities in Northern California, United States. The area code was created in 1991.
| Area Code | 510 |
|---|---|
| Major City | Oakland |
| Service Date | 09/02/1991 |
| Time Zone | Pacific |
| Overlay Complex | 341/510 |
| Location | California (CA) |
| Country | United States |
Some of the cities served by area code 510 include Oakland, Fremont, Hayward, Berkeley, Richmond, San Leandro, Alameda, Union City, Castro Valley and more.
| Area code | City/Town | County |
|---|---|---|
| 510 | Alameda | Alameda |
| 510 | Albany | Alameda |
| 510 | Berkeley | Alameda |
| 510 | Castro Valley | Alameda |
| 510 | Crockett | Contra Costa |
| 510 | El Cerrito | Contra Costa |
| 510 | El Sobrante | Contra Costa |
| 510 | Emeryville | Alameda |
| 510 | Fremont | Alameda |
| 510 | Hayward | Alameda |
| 510 | Hercules | Contra Costa |
| 510 | Knightsen | Contra Costa |
| 510 | Newark | Alameda |
| 510 | Oakland | Alameda |
| 510 | Piedmont | Alameda |
| 510 | Pinole | Contra Costa |
| 510 | Port Costa | Contra Costa |
| 510 | Richmond | Contra Costa |
| 510 | Rodeo | Contra Costa |
| 510 | San Leandro | Alameda |
| 510 | San Lorenzo | Alameda |
| 510 | San Pablo | Contra Costa |
| 510 | Union City | Alameda |