925 Area Code — Contra Costa, California
About the 925 Area Code
Area code 925 covers Contra Costa, California, a metropolitan market with a diverse mix of mobile, landline, and VoIP subscribers across residential and commercial accounts. Primary carriers include AT&T Mobility, Verizon Wireless, and T-Mobile USA. The area encompasses Concord, Walnut Creek, and Antioch and operates in the Pacific time zone, supporting a broad range of modern telecommunications services.
Key Information
- Region: Contra Costa
- State / Province: California
- Timezone: Pacific
- Major Cities: Concord, Walnut Creek, Antioch
Carriers & Network Type for 925 Numbers
Network mix: Mixed — 925 numbers include mobile, landline, and VoIP lines.
Common Scam Patterns
FCC complaint data for 925 numbers includes:
- Robocall/Auto-dialer
- Extended warranty scam
- Health insurance offer
- IRS/Government impersonation
If You Got a Text from 925
Who Typically Calls from the 925 Area Code?
Area code 925 covers Contra Costa, California, a metropolitan market with a diverse mix of mobile, landline, and VoIP subscribers across residential and commercial accounts. Primary carriers include AT&T Mobility, Verizon Wireless, and T-Mobile USA. The area encompasses Concord, Walnut Creek, and Antioch and operates in the Pacific time zone, supporting a broad range of modern telecommunications services. Calls from 925 numbers originate in Contra Costa, California. Residents, local businesses, schools, medical offices, and government agencies in this region all use 925 numbers. If you received an unexpected call or text from a 925 number, it may be a neighbor, a local service provider, or — in some cases — an unwanted solicitor.
Because 925 is a legitimate, widely used area code, scammers sometimes spoof it to make their calls appear local and trustworthy. This technique — called neighbor spoofing — makes it more likely that recipients will answer. A reverse phone lookup is the fastest way to find out whether a 925 number is genuinely local or spoofed.
Is a 925 Phone Number Spam?
Not all 925 calls are spam, but the area code is not immune to robocall campaigns and phone scams. Common complaints about 925 numbers include warranty extension scams, debt collection harassment, IRS impersonation calls, and unsolicited insurance offers.
If a 925 number called you and didn't leave a voicemail, that's a red flag — legitimate callers typically leave a message. Use Who Sent That Text Message to look up the number instantly and see whether other users have flagged it as spam.
You can also report a suspicious 925 number directly from our lookup results, helping protect others in the community from the same caller.
Look Up a 925 Number Now
Enter any 925 area code phone number below and get instant results — carrier, line type, caller name (where available), and spam reports submitted by real users.
Other Area Codes in California
California has multiple area codes serving different regions. If the number you received isn't from 925, check one of the other California area codes below.