831 Area CodeSalinas, CA
Area code 831 covers Salinas and nearby communities in California, in the Pacific Time (PT) zone, home to about 667,000 people across 60 cities. It's the only area code for this region, so the three digits alone place the caller.
Overview
- Major City
- Salinas
- State
- California (CA)
- Timezone
- Pacific Time (PT)
- Current Time
- Overlay
- No – unique area code
Where is area code 831?
Area code 831 serves part of Salinas, CA and the surrounding areas. It is a unique area code with no overlays.
Overview of the 831 Area Code
What is the 831 area code?
The 831 area code serves Salinas, California. When you see a 831 number, it indicates a local number within this geographic area.
Why was area code 831 created?
The 831 area code was established to serve the Salinas region in California. It provides telephone number coverage across 60 cities.
Geographic Coverage of the 831 Area Code
The 831 area code serves Salinas and surrounding areas in California. It operates within the Pacific Time (PT) time zone. This area code covers several key cities, including:
- Salinas
- Santa Cruz
- Watsonville
- Hollister
- Seaside
- Monterey
Got a call from an 831 number? It came from Salinas, CA. No other area code overlaps the 831 territory, so the prefix alone identifies where the caller is. Inside 831, Salinas holds about 24% of the population; the rest is split across 59 smaller cities.
Salinas Area Code Overview
The 831 area code provides comprehensive telephone coverage for Salinas and its surrounding communities. As the sole area code for this region, it uniquely identifies all local numbers within the service area.
What cities does area code 831 cover?
| City | State | Population | % of Area Code | % of City |
|---|---|---|---|---|
| Salinas | CA | 160,783 | 1% | 100% |
| Santa Cruz | CA | 62,581 | 0% | 100% |
| Watsonville | CA | 51,320 | 0% | 100% |
| Hollister | CA | 45,033 | 0% | 100% |
| Seaside | CA | 31,524 | 0% | 100% |
| Monterey | CA | 29,015 | 0% | 100% |
| Soledad | CA | 26,345 | 0% | 100% |
| Marina | CA | 23,047 | 0% | 100% |
| Greenfield | CA | 21,042 | 0% | 100% |
| Prunedale | CA | 17,560 | 1% | 100% |
* Sources: Population – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). Area code assignments – NANPA CO Code data. See our data methodology.
Has area code 831 been reported for unwanted calls?
Yes – 274 unwanted-call complaints were reported to the FTC for numbers showing a 831 area code (May 29 – Jul 2, 2026).
- 70% robocalls
- ↑ 3% vs prior period
Most-reported subjects
- Other42%115
- Reducing your debt (credit cards, mortgage, student loans)23%63
- Calls pretending to be government, businesses, or family and friends16%44
* Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints. Source: FTC Do Not Call (DNC) Reported Calls Data, retrieved 2026-07-05.
Which prefixes and exchanges belong to area code 831?
39% assigned to a telco
- 80% Landline
- 20% Wireless
- 0% Unknown
| Prefix | Usage | Carrier |
|---|---|---|
| (831)200- | Landline | Peerless Network Of California |
| (831)201- | Wireless | New Cingular Wireless Pcs |
| (831)202- | Landline | Mcimetro Access Transmission Services |
| (831)203- | Landline | American Messaging Services |
| (831)204- | Landline | Ymax Communications |
| (831)205- | Landline | Teleport Communications America |
| (831)206- | Wireless | Verizon Wireless |
| (831)207- | Wireless | Sprint Spectrum |
| (831)208- | Wireless | Verizon Wireless |
| (831)210- | Wireless | T-Mobile Usa |
Frequently Asked Questions about the 831 Area Code
Who called me from a 831 number?
A 831 number is assigned to Salinas, California, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 831 code to look nearby, so a 831 number doesn't prove the caller is local. Recently, 274 unwanted-call complaints were reported to the FTC for numbers showing the 831 code (70% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 831 a scam area code?
No area code is a scam on its own. 831 is a normal, officially assigned code for Salinas, California. Spam callers spoof local codes to raise the odds you answer, so 831 on your caller ID says nothing about who is really calling. Recently, 274 unwanted-call complaints were reported to the FTC for numbers showing the 831 code (70% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 831 area code?
Repeated calls from different 831 numbers are usually spoofing: a robocaller rotates through 831 numbers so each call looks local and slips past simple blocks. Recently, 274 unwanted-call complaints were reported to the FTC for numbers showing the 831 code (70% flagged as robocalls). Blocking one number rarely helps; voicemail screening, your carrier spam filter, and the Do Not Call Registry work better.
Should I answer an unknown 831 number?
If you aren't expecting a 831 call, let it ring to voicemail. Legitimate callers leave a message, most robocallers hang up when no one picks up, and answering can mark your number as active and bring more calls.
How do I block calls from the 831 area code?
Block a single 831 number from your recent-calls list (iPhone: tap the number, then Block this Caller; Android: tap the number, then Block or report spam). To cut the volume, turn on Silence Unknown Callers on iPhone or spam protection on Android, enable spam filtering from your carrier, and register at DoNotCall.gov. Blocking the entire 831 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 831?
Area code 831 covers Salinas and the surrounding area in California, spanning 60 cities with about 667,162 residents. No other code overlays this region, so 831 alone identifies the area.
Is 831 a real area code?
Yes. 831 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Salinas, California. A real code can still show up on spoofed spam calls, so treat unknown 831 calls with normal caution.
What timezone is the 831 area code in?
The 831 area code is in the Pacific Time (PT). Because a number can be kept when someone moves or switches to VoIP, a specific 831 caller may not be in that zone.
How do I call a 831 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 831 and the seven-digit number. From a mobile phone you can usually just enter +1 831 followed by the number and let the phone add the exit code for you.