831 area code — Salinas, CA geographic
- State
- California
- Major area
- Salinas
- Time zone
- Pacific
- In service since
- 1998-07-11
- Split from
- 408
- Active prefixes
- 403
- Rate centers
- 24
- Carriers
- 44
- Projected exhaust
- 2Q 2078
If a call shows area code 831, the number was issued in the Salinas area — a code active since 1998, on Pacific time. Note that porting and VoIP mean a 831 number can be used from anywhere — the code marks where the number was assigned.
403 central-office prefixes are currently active in this code, spread across 44 code-holding carriers. Thousands-block pooling applies to 305 prefixes, so a single prefix can belong to several carriers. Its prefixes map to 24 distinct rate centers.
NANPA projects numbering capacity to exhaust in 2Q 2078.
831 was created from 408 in 1998.
Dialing: 7D locally, 1+10D to other codes.
If a 831 call asks for money or personal data, treat the displayed number as unverified: hang up and reach the organization through its published number. Numbering data locates numbers, not callers.
Largest localities in 831
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| Salinas | 83 | 408 |
| Santa Cruz | 75 | — |
| Monterey | 63 | — |
| Watsonville | 30 | — |
| Hollister | 22 | 408 |
| Aptos | 19 | — |
| Carmel | 12 | — |
| Ben Lomond | 11 | — |
| Felton | 9 | — |
| Boulder Creek | 9 | — |
FAQ
Is 831 a toll-free number?
No. 831 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.
Will 831 run out of numbers?
NANPA's current forecast projects exhaust in 2Q 2078 — decades of capacity remain.
Why am I getting spam calls from 831 numbers?
Scammers spoof recognizable area codes so calls look local or familiar. A displayed 831 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 831 number from?
831 is assigned to Salinas and surrounding areas of California in the Pacific time zone. The three digits after the area code (the prefix) narrow it down to a rate center.