820 Area Code: Cities, Time Zone and Zip Codes
What area code is 820? The area code 820 is in California and it serves Oxnard, Simi Valley, Thousand Oaks, San Buenaventura (Ventura), Santa Maria, Santa Barbara, Samarillo, and some other surrounding cities. The area code 820 was created from area code 805 on June 1, 2018, and was first put to use on June