Area Code/County,Count 209 California,16676 213 California,5413 310 California,29335 323 California,20569 408 California,18710 415 California,17944 424 California,2518 442 California,474 510 California,23962 530 California,10939 559 California,8655 562 California,15190 619 California,17380 626 California,14225 628 California,130 650 California,14529 657 California,378 661 California,12415 669 California,707 707 California,14483 714 California,23348 747 California,245 760 California,17503 805 California,12691 818 California,18749 831 California,6272 858 California,6347 909 California,17388 916 California,26339 925 California,11136 949 California,12811 951 California,11147 Alameda California,19001 Alpine California,1 Amador California,554 Butte California,2632 Calaveras California,446 Colusa California,150 Contra Costa California,12503 Del Norte California,401 El Dorado California,2842 Fresno California,7721 Glenn California,110 Humboldt California,1523 Imperial California,369 Inyo California,202 Kern California,6072 Kings California,629 Lake California,635 Lassen California,331 Los Angeles California,98533 Madera California,733 Marin California,4466 Mariposa California,277 Mendocino California,715 Merced California,1016 Modoc California,57 Mono California,60 Monterey California,3189 Napa California,1795 Nevada California,1937 "No Zip Code Reported, California",2247 Orange California,41963 Placer California,4922 Plumas California,217 Riverside California,20607 Sacramento California,16109 San Benito California,556 San Bernardino California,15508 San Diego California,42048 San Francisco California,12779 San Joaquin California,5855 San Luis Obispo California,3629 San Mateo California,10217 Santa Barbara California,4005 Santa Clara California,26373 Santa Cruz California,3248 Shasta California,1945 Sierra California,26 Siskiyou California,626 Solano California,5038 Sonoma California,6335 Stanislaus California,4347 Sutter California,705 Tehama California,528 Trinity California,132 Tulare California,1833 Tuolumne California,724 Ventura California,11786 Yolo California,2223 Yuba California,653