. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 837 area code) below and access available caller information such as name, address, and more.
Federal Data
State Data
County Data
City Data
The 837 area code covers a large portion of northeastern and Northern California, encompassing the Sacramento Valley, Shasta Cascade, and the northern Sierra Nevada regions.
Area code 837 is an overlay to area code 530. Area code 530 was created in 1997 and area code 837 was added in 2025. Ten-digit dialing is already in effect.
Area code 837 is a General Purpose Code which was placed in service on January 1, 1947.
Our reverse phone lookup will analyze the three-digit prefix of any 837 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, California geographic region, and local calling area associated with the phone number.
| Company | Number of Prefixes |
|---|
| Rate Center | Number of Prefixes |
|---|
Lookup phone numbers starting with other California area codes:
California Reverse Lookup ➜