🇺🇸 831 area code
Area code 831 covers Salinas, Santa Cruz, Monterey and Watsonville and the surrounding area in California. Enter an 831 number below for a free check before you call back.
- Location: Salinas, California
- Time zone: Pacific (UTC−8)
- In service since July 11, 1998
Look up a number
Validity, carrier, line type, and region on the first pass.
Area code 831 at a glance
- Area code
- 831
- Location
- California, United States
- Main cities
- Salinas, Santa Cruz, Monterey, Watsonville, Carmel, Hollister
- Time zone
- Pacific (UTC−8)
- Local time now
- —
- In service since
- July 11, 1998
- Created from
- 408
- Local calls
- Dial 7 digits
- Number format
- (831) 555-0123
- From abroad
- +1 831 555 0123
Cities in area code 831
- Salinas
- Santa Cruz
- Monterey
- Watsonville
- Carmel
- Hollister
- Aptos
- Scotts Valley
- Seaside
- King City
Is a 831 call a scam?
An area code tells you where a number was first assigned, not where the caller is. Mobile numbers keep their area code when people move, and internet (VoIP) numbers can be picked in any area code — so an 831 number can be calling from anywhere.
Robocallers exploit that with "neighbor spoofing": showing an 831 number to people in California because a local-looking call is more likely to be answered. If an 831 call claims to be your bank, the IRS or a delivery company, hang up and call the official number yourself.
About area code 831
831 entered service on July 11, 1998, when it was split from 408.
FAQ
Area code 831 questions
Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.
Where is area code 831?
Area code 831 is in California, United States. It covers Salinas, Santa Cruz, Monterey, Watsonville, Carmel and Hollister.
What time zone is area code 831?
831 is in the Pacific (UTC−8) time zone, and observes daylight saving time.
When did area code 831 start?
831 entered service on July 11, 1998, created from 408.
How do I find out who called me from 831?
Enter the full number in the lookup at the top of this page. The free check confirms whether the number is valid and shows its carrier, line type and region; a full report adds owner and public-web records where they are available.
Why am I getting calls from area code 831?
If you live in or near California, they may be genuinely local — or robocalls spoofing a local-looking number. Unknown 831 callers who will not leave a message are best looked up before you call back.
Got a call from 831?
Run the free check first — validity, carrier, line type and region — and unlock the full report only if you need it.