831 Area Code: Monterey, Santa Cruz, Salinas
Updated: November 2026. Area code data: NANPA assignments via Simple Wikipedia and areacode.fyi, checked November 2026.
It covers Monterey, Santa Cruz, Salinas.
| Area code | 831 |
|---|---|
| Location | Monterey, Santa Cruz, Salinas |
| Time zone | Pacific Time |
| Type | Geographic |
| Region | California |
Where is 831?
Monterey, Santa Cruz, Salinas.
Time zone
Area code 831 is in the Pacific Time zone. The best time to call is generally between 9 a.m. and 8 p.m. local time. Use our best time to call tool to compare it with your own time.
History
The North American Numbering Plan was created in 1947 to organise telephone numbers across the United States, Canada and neighbouring regions. When an area runs out of phone numbers, the North American Numbering Plan Administrator (NANPA) either splits the area or adds an overlay code that covers the same area; overlays are now the usual approach, which is why 10-digit dialing is standard in most places. Area code 831 serves Monterey, Santa Cruz, Salinas.
How to dial 831
From the United States or Canada, dial 1 + 831 + the 7-digit number. From abroad, dial your international prefix, then 1 + 831 + the number — for example, +1 831 555 0132.
Is a call from 831 a scam?
Scammers can fake any area code, including 831. A number that looks local is not proof of who is calling. Never share passwords, verification codes or payment details with an unexpected caller; hang up and call the company back on a number from its official website. Report scam calls at reportfraud.ftc.gov, and forward spam texts to 7726.
Report scam calls at reportfraud.ftc.gov, forward spam texts to 7726, and register on the National Do Not Call Registry at donotcall.gov.
Nearby area codes
FAQs
What city is area code 831?
Monterey, Santa Cruz, Salinas.
What time zone is area code 831?
Pacific Time.
Is 831 a toll-free area code?
No. 831 is a regular geographic area code, so calls to it are charged at your normal rate.
How do I call a 831 number from abroad?
Dial your international prefix, then 1 + 831 + the 7-digit number — for example, +1 831 555 0132.
Should I call back an unknown 831 number?
Only if you are expecting the call. If you do not recognise the number, look the company up independently instead of calling back — scammers often hope a callback will connect you to a premium-rate or phishing line.
← Browse all area codes by state · Free phone number tools →