The area code 820 is located in Camarillo, California.
Area code 820 serves Camarillo, California, as an overlay to the long‑established 805 area code. Located in Ventura County on California’s Central Coast, Camarillo sits along U.S. 101 between Los Angeles and Santa Barbara, with quick access to the Pacific shoreline. The 820 overlay was introduced in 2018 to meet growing demand for new phone numbers in the region. Because it is an overlay, 10‑digit dialing is required for all local calls across the 805/820 service area.
Area code 820 covers the same communities as 805, including Camarillo and many nearby cities and landmarks, such as:
Camarillo is home to California State University Channel Islands and the popular Camarillo Premium Outlets, and the region features coastal destinations like Channel Islands National Park and Point Mugu State Park. Existing 805 numbers did not change when 820 was added; new lines may receive either 805 or 820. For calls within the area, dial the area code plus the seven‑digit number; from outside the U.S., use +1 before the 10‑digit U.S. number. This overlay helps keep local numbers available without changing established lines.
“Overlay area codes share the same geographic area and require 10‑digit dialing.” — North American Numbering Plan Administrator (NANPA)