| District of California area codes: 925 | |
|---|---|
| Country | United States |
| State/Province | California |
| Major City | Oakland |
| Time Zone | Pacific |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 925-263 | Contra Costa | Danville, CA | Global Crossing Local Services-ca |
| 925-264 | Alameda | Pleasanton, CA | Global Crossing Local Services-ca |
| 925-265 | Contra Costa | Concord, CA | Global Crossing Local Services-ca |
| 925-267 | Contra Costa | Pittsburg, CA | Xo California |
| 925-268 | Contra Costa | Moraga, CA | Xo California |
| 925-269 | Contra Costa | Martinez, CA | Xo California |
| 925-270 | Contra Costa | Concord, CA | Broadwing Communications |
| 925-271 | Alameda | Pleasanton, CA | Teleport Communications Group - San Francisco |
| 925-272 | Contra Costa | Danville, CA | Level 3 Communications |
| 925-273 | Alameda | Livermore, CA | Xo California |
| 925-274 | Contra Costa | Walnut Creek, CA | Pacific Bell |
| 925-275 | Contra Costa | San Ramon, CA | Pacific Bell |
| 925-276 | Contra Costa | Clayton, CA | Xo California |
| 925-277 | Contra Costa | San Ramon, CA | Pacific Bell |
| 925-278 | Contra Costa | Walnut Creek, CA | Comcast Phone Of California |
| 925-279 | Contra Costa | Walnut Creek, CA | Pacific Bell |
| 925-280 | Contra Costa | Walnut Creek, CA | Pacific Bell |
| 925-281 | Contra Costa | Antioch, CA | Pac - West Telecomm |
| 925-282 | Contra Costa | Lafayette, CA | Mcimetro Access Transmission Services LLC |
| 925-283 | Contra Costa | Lafayette, 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.