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The 837 area code covers the same area as 530, including Chico, Redding and 105 more places in California.

Area code 837 is in California, on Pacific Time. In the 837 area, phone numbers are given out most in Butte County, then Shasta and Yolo counties. It has been in service since January 31, 2025. 530 covers the same area, so two neighbours can have different area codes.

Where
8 counties in California, mostly Butte County, Shasta County and Yolo County
Time zone
Pacific Time
In service since
January 31, 2025
Shares its area with
530 (since 1997)
Prefixes in use
8
How to dial
Local calls need 1, then the area code, then the number: 1-837-555-0142.

Find out who called you from an 837 number.

Enter the full 10-digit number to see who it is listed to, the city and state on the listing, and whether it is a mobile, landline or VoIP line. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup.

Works for US & Canada numbers. Enter a 10-digit number, e.g. (415) 555-0132.

Free & rate-limited. No signup required to try.

Redding holds 25% of the phone prefixes in area code 837.

A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 8 prefixes in use shows where 837 numbers are actually given out.

  • Redding2 prefixes, 25%
  • Red Bluff1 prefix, 13%
  • Chico1 prefix, 13%
  • Truckee1 prefix, 13%
  • Shingle Springs1 prefix, 13%
  • Nevada City1 prefix, 13%
One dot per US area code; 837 is the ringed one.

Also served: Truckee, Shingle Springs, Anderson and Yreka and 95 smaller places.

Each prefix, or block of 1,000 numbers inside it, is also handed to a carrier. A number keeps its digits when its owner switches carrier, so the prefix no longer tells you who carries it today. Our free carrier lookup shows which carrier an 837 number is on now.

837 started in 2025 as an overlay on 530, and its ground has not changed since.

  1. 2025

    837 starts on January 31, 2025, as an overlay on 530: new numbers on the same ground.

An 837 number on your screen can still be a scam, because caller ID is easy to fake.

  1. Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
  2. Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
  3. Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
  4. Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.

The area codes closest to 837 are 707, 916 and 415.

This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.

707 / 369Santa Rosa, CA916 / 279Sacramento, CA415 / 628San Francisco, CA925Walnut Creek, CA510 / 341Oakland, CA209 / 350Stockton, CA

California has 40 other area codes.

209Stockton213Los Angeles279Sacramento310Santa Monica323Los Angeles341Oakland350Stockton357Kingsburg369Santa Rosa408San Jose415San Francisco424Beverly Hills442Victorville510Oakland530Chico559Fresno562Long Beach619San Diego626Alhambra628San Francisco650Palo Alto657Anaheim661Bakersfield669San Jose707Santa Rosa714Anaheim738Los Angeles747Burbank760Palm Springs805Santa Barbara818Van Nuys820Camarillo831Salinas840Pomona858San Diego909Ontario916Sacramento925Walnut Creek949Irvine951Riverside

Browse every US area code

These are the questions people ask most about area code 837.

Where is area code 837?

837 covers Chico, Redding, Marysville and Davis and 103 more places in California. In the 837 area, phone numbers are given out most in Butte County, then Shasta and Yolo counties.

What state is area code 837 in?

California. 837 is a California area code on Pacific Time.

What cities use area code 837?

The places holding the most 837 prefixes are Chico, Redding, Marysville, Davis, Woodland, Oroville, South Lake Tahoe and Red Bluff, out of 107 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.

What time zone is area code 837 in?

837 is on Pacific Time.

When did area code 837 start?

837 went into service on January 31, 2025, as an overlay on 530: new numbers for the same area.

Is 837 the same area as 530?

Yes. 530 (since 1997) covers the same ground as 837. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.

How do I dial an 837 number?

Local calls need 1, then the area code, then the number: 1-837-555-0142.

Is 837 a toll-free number?

No. 837 is a regular area code for Chico and Redding in California, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.

What area codes are near 837?

The closest are 707/369 (Santa Rosa, California), 916/279 (Sacramento, California), 415/628 (San Francisco, California) and 925 (Walnut Creek, California), measured between the centres of each area.

Who called me from an 837 number?

Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.

Is area code 837 a scam?

837 is a real California area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.

Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.