In California, call boxes are identified by their mileage through individual counties using postmiles for reference.
California | University of California, Berkeley | University of Southern California | University of California | Berkeley, California | Baja California | Southern California | Oakland, California | Santa Barbara, California | Sacramento, California | Pasadena, California | California Institute of Technology | Long Beach, California | University of California, San Diego | Burbank, California | California Gold Rush | Palm Springs, California | California State Assembly | University of California, Santa Cruz | Governor of California | University of California, Davis | Irvine, California | Anaheim, California | Fresno, California | University of California, Santa Barbara | Riverside, California | Santa Cruz, California | Bakersfield, California | Santa Ana, California | Malibu, California |