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US area code · California

Area code 925

Where the 925 area code is, its overlay and how to dial a +1 925 number from anywhere.

CoversAntioch, CaliforniaTime zonePacific (PT)TypeGeographic
Quick answer

The 925 area code is in Antioch, California, United States (Pacific (PT)). To call from abroad: +1 925 555-0123.

StateCalifornia
Main areaAntioch
Time zonePacific (PT)
TypeGeographic
10-digit dialingRequired
In service since19-May-1997

The 925 area code is a geographic North American Numbering Plan (NANP) code covering Antioch, California. It has been in service since 19-May-1997 and sits in the Pacific (PT) time zone.

How to dial a 925 number

From abroad+1 925 555-0123
Within the US / Canada1 925 555-0123
Locally (same area)925 555-0123

Cities in the 925 area code

A 925 number is usually in one of these places in California — 2 counties.

Antioch Contra CostaBay PointBrentwood Contra CostaConcord Contra CostaDanville Contra CostaDublin AlamedaLafayette Contra CostaLivermore AlamedaMartinez Contra CostaOakley Contra CostaPittsburg Contra CostaPleasant Hill Contra CostaPleasanton AlamedaSan Ramon Contra CostaWalnut Creek Contra Costa

Other California area codes

209213279310323341350357369408415424442510530559

Frequently asked questions

Where is the 925 area code?

The 925 area code is in Antioch, California, United States (Pacific (PT)).

Do I have to dial 10 digits for 925?

Yes — dial the area code plus the seven-digit number.

How do I call a 925 number from another country?

Dial your exit code (or +), then 1, then 925, then the number: +1 925 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 925 number does not pinpoint a street or ZIP code.

Missed a call from +1 925?

In the 30 days to September 24, 2026, 595 unwanted calls showing a 925 number were reported to the US Federal Trade Commission, 66% of them recorded messages or robocalls. That puts 925 at #141 of 670 area codes reported.

Other283
Dropped call or no message81
Reducing your debt (credit cards, mortgage, student loans)73
Calls pretending to be government, businesses, or family and friends41
Before you call back
  • If you do not know anyone in California, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 925 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 925 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 925:

Pacific Bell 206New Cingular Wireless PCS, LLC 48T-Mobile USA, Inc. 44Mcimetro Access Transmission Services LLC 39Cellco Partnership Dba Verizon Wireless 38U.S. Telepacific Corp. Dba Tpx Communications 37

About 20% of the 655 prefixes in use belong to mobile carriers: a 925 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 925 — cities & rate centres