Area code 925 — California
Area code 925 is in California and serves Concord, Pleasant Hill, Walnut Creek, Martinez. Time zone, overlays, counties and ZIP codes.
| Location | California (inland regions of the East Bay: Livermore, Concord, Pleasant Hill, Walnut Creek, Martinez, Pleasanton, and Dublin, just east of the hills that ring San Francisco Bay) |
|---|---|
| Main places | Concord, Pleasant Hill, Walnut Creek, Martinez, Pleasanton, Dublin |
| State | California |
| Status | In service · since 1998 |
| Time zone | Pacific · |
| Local dialing | 1+10D |
History
- Split of 510
Counties (approximate)
AlamedaAlameda CountyContra CostaContra Costa CountySacramento CountySan JoaquinSan Joaquin CountySolano CountyStanislausStanislaus County
ZIP codes in area code 925
Approximate: area code boundaries follow telephone rate centers, not ZIP codes.
94505 Discovery Bay94506 Danville94507 Alamo94509 Antioch94510 Benicia94511 Bethel Island94512 Birds Landing94513 Brentwood94514 Byron94516 Canyon94517 Clayton94518 Concord94519 Concord94520 Concord94521 Concord94522 Concord94523 Pleasant Hill94524 Concord94526 Danville94527 Concord94528 Diablo94529 Concord94531 Antioch94535 Travis Afb94537 Fremont94540 Hayward94548 Knightsen94549 Lafayette94550 Livermore94551 Livermore94552 Castro Valley94553 Martinez94556 Moraga94557 Hayward94561 Oakley94565 Pittsburg94566 Pleasanton94568 Dublin94569 Port Costa94570 Moraga
Format a 925 number
US numbers are written as (925) 555-0123 or 925-555-0123. From outside the US, dial +1 925 555 0123.
Is a call from 925 a scam?
An area code only tells you where a number was assigned. Caller ID can be faked (“spoofed”), so do not trust a call just because the area code looks local. Never share codes or payment details with unexpected callers.
Sources: NANPA via NumberResearch.org (CC BY 4.0); place names and history from Wikipedia (CC BY-SA 4.0). See data sources.