831 area code
Salinas area, Pacific Time.Area code 831 covers Salinas, Santa Cruz, Monterey and 21 more places in California, on Pacific Time.
Right now in Salinas
Pacific Time (PST, UTC-8; PDT, UTC-7 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
Small talk
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Where 831 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 831 has 24. Each one's share is how many 831 numbers start there. Its biggest metro area is San Jose-Sunnyvale-Santa Clara, CA.
- Salinas21%
- Santa Cruz19%
- Monterey16%
- Watsonville7%
- Hollister5%
- Aptos5%
- Carmel3%
- Ben Lomond3%
- Boulder Creek2%
- Felton2%
Also: Soledad, Gonzales, Greenfield (Monterey), King City, Big Sur, Castroville, Tres Pinos, Carmel Valley, Chualar, San Ardo, San Juan, San Lucas + 2 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call an 831 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 831 number to them, since you can't tell a work line from a personal cell.
What applies to 831Every day, 8 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
The 831 area code
831 went into service on July 11, 1998, split off from 408. Local calls can still be dialed with 7 digits.
- 1998831 starts
Source: NANPA area code database
Other California area codes
All California area codes- Stockton209350
- Los Angeles213323738
- Sacramento279916
- Compton310424
- Oakland341510
- Fresno357559
- Santa Rosa369707
- San Jose408669
- San Francisco415628
- Oceanside442760
- Chico530837
- Long Beach562
- San Diego619858
- Alhambra626
- Palo Alto650
- Anaheim657714
- Bakersfield661
- Van Nuys747818
- Santa Barbara805820
- Ontario840909
- Walnut Creek925
- Irvine949
- Riverside951
Calling a list of 831 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
831 area code FAQ
What area code is 831?
831 is a California area code for Salinas, Santa Cruz, Monterey, Watsonville and 20 more places.
What time zone is the 831 area code in?
Pacific Time (PST, UTC-8; PDT, UTC-7 in summer).
What are the calling hours for 831 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 831 area code start?
On July 11, 1998. It was split from 408.
Calling 831 numbers? Reach more of them.
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