Find any 820- phone number in California

The 820 area code is part of the North American Numbering Plan (NANP), which is a telephone numbering system used in many countries throughout the world, including the United States, Canada, and some Caribbean nations. NANP assigns each region a three-digit area code based on the geographical region in which it is located. In the US, these area codes are divided into sections called Numbering Plan Areas (NPAs). The 820 area code lies within the NPA for California.

Within California, the 820 area code is assigned to the western part of the state, including the northern Los Angeles area and counties such as Kern, Ventura, and San Bernardino. Since the area code is geographically-based, it can become overcrowded over time and new codes are established as needed. This could also happen if a specific area is expected to experience a significant increase in growth. To provide additional calling numbers, the 820 area code was split into two distinct codes: 818 and 805. As a result, customers in the western parts of the state are now using both area codes.