The 837 area code covers the same area as 530, including Chico, Redding and 105 more places in California.
837 has been in service since 2025, on Pacific Time. 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
- 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, where it is registered, and whether it is a mobile, landline or VoIP line.
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%
Also served: Truckee, Shingle Springs, Anderson and Yreka and 95 smaller places.
837 started in 2025 as an overlay on 530, and its ground has not changed since.
2025
837 starts 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.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- 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.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
California has 40 other area codes.
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 Butte County, Shasta County and Yolo County.
What time zone is area code 837 in?
837 is on Pacific Time.
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.
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.