831 Area Code — Monterey, California
About the 831 Area Code
Area code 831 covers Monterey, 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 Salinas, Monterey, and Santa Cruz and operates in the Pacific time zone, supporting a broad range of modern telecommunications services.
Key Information
- Region: Monterey
- State / Province: California
- Timezone: Pacific
- Major Cities: Salinas, Monterey, Santa Cruz
Carriers & Network Type for 831 Numbers
Network mix: Mixed — 831 numbers include mobile, landline, and VoIP lines.
Common Scam Patterns
FCC complaint data for 831 numbers includes:
- Robocall/Auto-dialer
- Extended warranty scam
- Health insurance offer
- IRS/Government impersonation
If You Got a Text from 831
Who Typically Calls from the 831 Area Code?
Area code 831 covers Monterey, 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 Salinas, Monterey, and Santa Cruz and operates in the Pacific time zone, supporting a broad range of modern telecommunications services. Calls from 831 numbers originate in Monterey, California. Residents, local businesses, schools, medical offices, and government agencies in this region all use 831 numbers. If you received an unexpected call or text from a 831 number, it may be a neighbor, a local service provider, or — in some cases — an unwanted solicitor.
Because 831 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 831 number is genuinely local or spoofed.
Is a 831 Phone Number Spam?
Not all 831 calls are spam, but the area code is not immune to robocall campaigns and phone scams. Common complaints about 831 numbers include warranty extension scams, debt collection harassment, IRS impersonation calls, and unsolicited insurance offers.
If a 831 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 831 number directly from our lookup results, helping protect others in the community from the same caller.
Look Up a 831 Number Now
Enter any 831 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 831, check one of the other California area codes below.