California – New 530/837 area code overlay

To ensure a continuing supply of telephone numbers, the California Public Utilities Commission has approved an all-services overlay for the 530 area code. The 530 area code serves most of northeastern California, covering 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 communities such as Chico, Davis, El Dorado Hills, Oroville, Paradise, Placerville, Red Bluff, Redding, South Lake Tahoe, Truckee, Woodland, and Yuba City, as well as unincorporated areas. The new 837 area code will serve the same geographic region currently served by the 530 area code.

Beginning January 31, 2025, customers in the 530 area code region may be assigned a number in the new 837 area code when they request new service or an additional line. Customers receiving the 837 area code will be required to dial 1+10 digits for all local calls, just as customers with telephone numbers from the 530 area code do today. Mobile phone customers receiving 837 numbers may dial either 10 digits or 1+10 digits.

Download a copy of the bill insert in English or Spanish.