The CPUC began the process to introduce a new area code to the 530 area codes, as the supply of available prefixes in the 530 area code region is expected to be depleted by September 2025. Pending approval by the CPUC, the new area code will be introduced on top of the 530 area code region.

On September 30, 2022, the North American Numbering Plan Administrator filed A.22-09-016 with the CPUC on behalf of the telecommunications industry, requesting that the CPUC approve an overlay in the 530 area code geographic area to provide additional numbering resource in the region.

On June 8, 2023, the CPUC acted to ensure that telephone numbers continue to be available to meet the demand in the geographic region served by the 530 area code by approving a second area code (called an overlay) that will provide additional numbering resources while minimizing customer inconvenience. The new area code to overlay the 530 area codes is 837. Read the media advisory here

Additional Information

The 530 area code region was formed in 1997 when the CPUC approved an area code split of the 916 area code, introducing the 530 area code. The 530 area code covers most of the northeastern portion of California, including all or portions of Alpine, Butte, Colusa, El Dorado, Glenn, Humboldt, Lassen, Modoc, Mono, Nevada, Placer, Plumas, Shasta, Sierra, Siskiyou, Solano, Sutter, Tehama, Trinity, Yolo, and Yuba counties. It serves cities and communities including but not limited to Chico, Davis, El Dorado Hills, Oroville, Paradise, Placerville, Red Bluff, Redding, South Lake Tahoe, Truckee, Woodland, and Yuba City, as well as unincorporated areas.


Please direct questions concerning telephone numbering and area codes to staff at Numbering Staff.