Newbury Park Oak View Ojai Oxnard Piru Point Mugu Port Hueneme Santa Paula Saticoy Simi Valley Somis Thousand Oaks Ventura See also List of California area codes List of North American Numbering Plan area codes References External links 805/820 805/820 Monterey County, California Santa Barbara County, California San Luis Obispo County, California Ventura County, California