| Area Code | 925 |
| State | California |
| Current Time in Area Code 925 | 925> PDT |
| Timezone | Pacific Daylight Time |
| Regional Market Area | Metro Bay Area |
| Population (2020) | 2848280 |
| Adjacent Area Codes | 209,279,341,408,510,669,707,916 |
| Alameda County |
| Contra Costa County |
| Antioch |
| Brentwood |
| Concord |
| Danville |
| Dublin |
| Livermore |
| Martinez |
| Oakley |
| Pittsburg |
| Pleasant Hill |
| Pleasanton |
| San Ramon |
| Walnut Creek |