Southern California is generally considered to be from the line drawn by the San Luis Obispo/Monterey, Kern/Kings & Tulare, and San Bernardino/Inyo County Lines south to the Mexican Border. The frequencies and talkgroups are from various sources including Radio Reference, Freq of Nature, ScanCal, and the Police Call SoCal edition.

San Luis Obispo County
Kern County
San Bernardino County
Santa Barbara County
Ventura County
Los Angeles County
Riverside County
Orange County
San Diego County
Imperial County
California State Parks
U.S. Forest Service
National Park Service
Bureau of Land Management
Department of Defense