925 Area Code — Concord, CA
Area code 925 serves Concord and 4 other cities in California. Local time follows America/Los_Angeles. It has no overlay codes.
- State
- California
- Primary city
- Concord
- Timezone
- America/Los_Angeles
- In service since
- 1998
- Type
- Geographic
- Overlay codes
- None
Cities Served by 925
The 925 area code covers 5 cities and communities in California.
- Concord
- Walnut Creek
- Antioch
- Pleasanton
- Livermore
About Area Code 925
Area code 925 is a North American Numbering Plan (NANP) area code that has been in service since 1998. It is administered by NANPA on behalf of the FCC and serves the California region anchored on Concord.
925 is currently a single-coverage geographic area code with no overlays. This means a 7-digit number in this area code is unique within its rate centers, though best-practice is always to dial the full 10-digit number when contacting a 925 line.
Mobile numbers in 925 are portable: a person who moved away from Concord may still carry a 925 mobile number on their device. If you receive an unexpected call from a 925 number, run it through the reverse lookup tool above for the most accurate, free identification.
If you live or do business in California, you may also interact with neighbouring or overlay codes. See the related codes section below to explore the rest of California.
Other California Area Codes
Continue exploring the California numbering plan.
925 Area Code FAQ
Where is area code 925?
Area code 925 is located in California, primarily serving Concord and surrounding cities including Walnut Creek, Antioch, Pleasanton. The region operates on PT (America/Los_Angeles) time.
What state is 925 area code?
925 is a California area code. It was put into service in 1998 and has no overlay codes — it covers its geographic area exclusively.
Is 925 a scam area code?
925 is a legitimate North American area code allocated by NANPA to California. Like any geographic area code, scammers sometimes spoof 925 numbers — judge each call by content (urgent demands, unfamiliar transfers) rather than the area code alone. Run the specific number through our reverse lookup if you're unsure.
What time zone does 925 use?
Area code 925 operates on PT (America/Los_Angeles). Numbers in this area code follow standard California time-zone rules including any daylight-saving transitions for that region.
Can I look up a specific 925 phone number?
Yes. Use the reverse lookup widget above to enter a full 925 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.