To faciltiate users, the United States of America is divided into regions known as Area Codes, corresponding to particular geographic telephone dialing areas.
An area code denotes the regional location of a phone number within the United States.
The Area Code table below shows an area codes each.
Area Code 925 listing, by city
@The cities listed with each area code are the major cities for that area code;
| City / State | Area code | Zip Code | County | Iso | |
|---|---|---|---|---|---|
| Alamo (California) | 925 | 94507 | Contra Costa | US-CA | |
| Antioch (California) | 925 | 94509 | Contra Costa | US-CA | |
| Antioch (California) | 925 | 94531 | Contra Costa | US-CA | |
| Bethel Island (California) | 925 | 94511 | Contra Costa | US-CA | |
| Brentwood (California) | 925 | 94513 | Contra Costa | US-CA | |
| Byron (California) | 925 | 94514 | Contra Costa | US-CA | |
| Canyon (California) | 925 | 94516 | Contra Costa | US-CA | |
| Clayton (California) | 925 | 94517 | Contra Costa | US-CA | |
| Concord (California) | 925 | 94518 | Contra Costa | US-CA | |
| Concord (California) | 925 | 94519 | Contra Costa | US-CA | |
| Concord (California) | 925 | 94520 | Contra Costa | US-CA | |
| Concord (California) | 925 | 94521 | Contra Costa | US-CA | |
| Concord (California) | 925 | 94522 | Contra Costa | US-CA | |
| Concord (California) | 925 | 94524 | Contra Costa | US-CA | |
| Concord (California) | 925 | 94527 | Contra Costa | US-CA | |
| Concord (California) | 925 | 94529 | Contra Costa | US-CA | |
| Danville (California) | 925 | 94506 | Contra Costa | US-CA | |
| Danville (California) | 925 | 94526 | Contra Costa | US-CA | |
| Diablo (California) | 925 | 94528 | Contra Costa | US-CA | |
| Discovery Bay (California) | 925 | 94505 | Contra Costa | US-CA | |
| Dublin (California) | 925 | 94568 | Alameda | US-CA | |
| Fremont (California) | 925 | 94536 | Alameda | US-CA | |
| Fremont (California) | 925 | 94538 | Alameda | US-CA | |
| Fremont (California) | 925 | 94539 | Alameda | US-CA | |
| Fremont (California) | 925 | 94536 | Alameda | US-CA | |
| Fremont (California) | 925 | 94538 | Alameda | US-CA | |
| Fremont (California) | 925 | 94539 | Alameda | US-CA | |
| Hayward (California) | 925 | 94544 | Alameda | US-CA | |
| Hayward (California) | 925 | 94545 | Alameda | US-CA | |
| Lafayette (California) | 925 | 94549 | Contra Costa | US-CA | |
| Livermore (California) | 925 | 94550 | Alameda | US-CA | |
| Livermore (California) | 925 | 94551 | Alameda | US-CA | |
| Martinez (California) | 925 | 94553 | Contra Costa | US-CA | |
| Moraga (California) | 925 | 94556 | Contra Costa | US-CA | |
| Moraga (California) | 925 | 94570 | Contra Costa | US-CA | |
| Moraga (California) | 925 | 94575 | Contra Costa | US-CA | |
| Oakland (California) | 925 | 94612 | Alameda | US-CA | |
| Oakland (California) | 925 | 94615 | Alameda | US-CA | |
| Oakland (California) | 925 | 94617 | Alameda | US-CA | |
| Oakland (California) | 925 | 94612 | Alameda | US-CA | |
| Oakland (California) | 925 | 94615 | Alameda | US-CA | |
| Oakland (California) | 925 | 94617 | Alameda | US-CA | |
| Oakley (California) | 925 | 94561 | Contra Costa | US-CA | |
| Orinda (California) | 925 | 94563 | Contra Costa | US-CA | |
| Pittsburg (California) | 925 | 94565 | Contra Costa | US-CA | |
| Pleasant Hill (California) | 925 | 94523 | Contra Costa | US-CA | |
| Pleasanton (California) | 925 | 94566 | Alameda | US-CA | |
| Pleasanton (California) | 925 | 94588 | Alameda | US-CA | |
| San Ramon (California) | 925 | 94582 | Contra Costa | US-CA | |
| San Ramon (California) | 925 | 94583 | Contra Costa | US-CA | |
| Sunol (California) | 925 | 94586 | Alameda | US-CA | |
| Walnut Creek (California) | 925 | 94597 | Contra Costa | US-CA | |
| Walnut Creek (California) | 925 | 94595 | Contra Costa | US-CA | |
| Walnut Creek (California) | 925 | 94596 | Contra Costa | US-CA | |
| Walnut Creek (California) | 925 | 94598 | Contra Costa | US-CA | |
| Walnut Creek (California) | 925 | 94595 | Contra Costa | US-CA | |
| Walnut Creek (California) | 925 | 94596 | Contra Costa | US-CA | |
| Walnut Creek (California) | 925 | 94598 | Contra Costa | US-CA |