| General Information | |
|---|---|
| Country | United States |
| State/Province | California |
| Major City | Walnut Creek |
| Time Zone | Pacific (UTC-08:00) |
| Current Local Time | 20:31 |
| Prefix | County | Primary City |
|---|---|---|
| 925-200 | Alameda | Pleasanton |
| 925-201 | Alameda | Pleasanton |
| 925-202 | Alameda | Pleasanton |
| 925-203 | Contra Costa | Pittsburg |
| 925-204 | Contra Costa | Contra Costa |
| 925-205 | Contra Costa | Antioch |
| 925-206 | Contra Costa | Antioch |
| 925-207 | Contra Costa | Concord |
| 925-208 | Contra Costa | Danville |
| 925-209 | Alameda | Pleasanton |
| 925-210 | Contra Costa | Walnut Creek |
| 925-212 | Contra Costa | Walnut Creek |
| 925-213 | Contra Costa | Walnut Creek |
| 925-215 | Alameda | Livermore |
| 925-216 | Contra Costa | San Ramon |
| 925-217 | Contra Costa | Danville |
| 925-218 | Alameda | Pleasanton |
| 925-219 | Contra Costa | Antioch |
| 925-220 | Contra Costa | Walnut Creek |
| 925-221 | Contra Costa | Walnut Creek |
| 925-222 | Contra Costa | Concord |
| 925-223 | Alameda | Pleasanton |
| 925-224 | Alameda | Pleasanton |
| 925-225 | Alameda | Pleasanton |
| 925-226 | Alameda | Fremont |
| 925-227 | Alameda | Pleasanton |
| 925-228 | Contra Costa | Martinez |
| 925-229 | Contra Costa | Martinez |
| 925-230 | Contra Costa | San Ramon |
| 925-231 | Contra Costa | Martinez |
| 925-232 | Contra Costa | Pittsburg |
| 925-233 | Alameda | Sunol |
| 925-234 | Contra Costa | Antioch |
| 925-235 | Contra Costa | Moraga |
| 925-236 | Contra Costa | San Ramon |
| 925-237 | Contra Costa | Antioch |
| 925-238 | Contra Costa | Antioch |
| 925-239 | Contra Costa | Walnut Creek |
| 925-240 | Contra Costa | Brentwood |
| 925-241 | Contra Costa | San Ramon |
| 925-242 | Contra Costa | Danville |
| 925-243 | Alameda | Livermore |
| 925-244 | Contra Costa | Danville |
| 925-245 | Alameda | Livermore |
| 925-246 | Contra Costa | Concord |
| 925-247 | Contra Costa | Moraga |
| 925-248 | Contra Costa | San Ramon |
| 925-249 | Alameda | Pleasanton |
| 925-250 | Contra Costa | Concord |
| 925-251 | Alameda | Pleasanton |