Where Is Area Code 925?
Area code 925 is found in the US state of California. Primarily servicing the city of Concord (population: 127291), area code 925 covers 2 counties of California.
Located in the Pacific time zone, area code 925 is on the same time as Los Angeles, CA.
Area code 925 was brought into effect on March 14, 1998. 925 was split from the parent 510 area code.
Counties in Area Code 925
- Alameda,
- Contra Costa.
Most Populous Cities in Area Code 925
| City | County | City Population | Time Zone |
|---|---|---|---|
| Concord | Contra Costa | 127,291 | PST |
| Antioch | Contra Costa | 105,722 | PST |
| Pittsburg | Contra Costa | 87,107 | PST |
| Livermore | Alameda | 86,227 | PST |
| Walnut Creek | Contra Costa | 84,960 | PST |
| San Ramon | Contra Costa | 75,534 | PST |
| Pleasanton | Alameda | 73,836 | PST |
| Brentwood | Contra Costa | 56,196 | PST |
| Danville | Contra Costa | 55,114 | PST |
| Martinez | Contra Costa | 48,436 | PST |
| Dublin | Alameda | 47,370 | PST |
| Oakley | Contra Costa | 37,579 | PST |
| Pleasant Hill | Contra Costa | 34,547 | PST |
| Lafayette | Contra Costa | 27,646 | PST |
| Orinda | Contra Costa | 18,187 | PST |
| Moraga | Contra Costa | 16,674 | PST |
| Alamo | Contra Costa | 15,322 | PST |
| Discovery Bay | Contra Costa | 13,793 | PST |
| Clayton | Contra Costa | 12,745 | PST |
| Bethel Island | Contra Costa | 2,199 | PST |
| Byron | Contra Costa | 1,399 | PST |
Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.
View all United States Area Codes.
This page was last updated on July 3, 2015.