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.
With new telephone numbers in the 530 area code region in high demand, the CPUC in June 2023 approved the implementation of an area code overlay, which adds a second area code to the same geographic region served by the existing 530 area code.
CPUC Reminds Consumers of the New 837 Area Code Coming to the 530 Region
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.
530 area code webcast 530 area code presentation 213/323/738 Area Code The 213/323 area code is projected to be depleted of available prefixes by June 2025. On , the CPUC approved an overlay and a new area code in Decision 23-03-006 to provide additional numbering resources in the geographic region served by the 213/323 area codes.
Map update 2025.10 not showing up in Garmin Express - Edge 530 ...