The California Public Utilities Commission (CPUC) has approved a second area code (837), called an overlay, to the 530 region, which serves the northeastern portion of California.
The 530 area code is projected to run out of available prefixes (the first three numbers after the area code in a telephone number) during the third quarter of 2025.
The new 837 area code overlay will ensure that telephone numbers continue to be available to meet the demand in the geographic region served by the 530 area code while minimizing customer inconvenience. An area code overlay adds an additional area code to the geographic region served by the existing area code(s). Therefore, multiple area codes co-exist within the same geographic region.
How does this impact you?
Existing 530/837 customers will retain their area code and specific telephone number(s). Customers will continue to dial the three-digit area code for all calls to and from telephone numbers with the 530 and 837 area codes.
The price of a call will not change due to the overlay. Customers can still dial just three digits to reach 911, as well as 211, 311, 411, 511, 611, 711, and 811.
What area does the 530/837 overlay cover?
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.
The 530 area code was formed in 1997 when the CPUC approved an area code split of the 916 area code, introducing the 530 area code.
For more information, visit the California Public Utilities webpage.