| District of California area codes: 925 | |
|---|---|
| Country | United States |
| State/Province | California |
| Major City | Oakland |
| Time Zone | Pacific |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 925-952 | Contra Costa | Walnut Creek, CA | Pacific Bell |
| 925-953 | Contra Costa | Walnut Creek, CA | Tw Telecom Of California Lp |
| 925-954 | Alameda | Oakland, CA | Mpower Communications Corp |
| 925-955 | Alameda | Oakland, CA | Pac - West Telecomm |
| 925-956 | Contra Costa | Walnut Creek, CA | Xo California |
| 925-957 | Contra Costa | Martinez, CA | Pacific Bell |
| 925-960 | Alameda | Livermore, CA | Pacific Bell |
| 925-961 | Alameda | Livermore, CA | Pacific Bell |
| 925-962 | Contra Costa | Lafayette, CA | Pacific Bell |
| 925-963 | Alameda | Pleasanton, CA | New Cingular Wireless PCS |
| 925-964 | Contra Costa | Danville, CA | Pacific Bell |
| 925-965 | Alameda | Pleasanton, CA | AT&T Local |
| 925-967 | Contra Costa | San Ramon, CA | Pacific Bell |
| 925-968 | Contra Costa | Danville, CA | Pacific Bell |
| 925-969 | Contra Costa | Concord, CA | Pacific Bell |
| 925-973 | Contra Costa | San Ramon, CA | Pacific Bell |
| 925-974 | Contra Costa | Walnut Creek, CA | Pacific Bell |
| 925-975 | Contra Costa | Walnut Creek, CA | Pacific Bell |
| 925-977 | Contra Costa | Walnut Creek, CA | Pacific Bell |
| 925-978 | Contra Costa | Antioch, CA | Pacific Bell |
There are 552 prefixes, In the code area, the major cities are Antioch, CA;Bay Point, CA;Brentwood, CA;Concord, C. The major city is Oakland.