The area code 818 is located in Agoura Hills, California.
Area code 818 serves Agoura Hills, California, in western Los Angeles County along the US‑101, where the Santa Monica Mountains meet the San Fernando Valley. This area code is important for local phone numbers across the Valley and nearby foothill communities, and it includes Agoura Hills with an overlay by 747 for added numbering capacity. Established in 1984 as a split from 213, 818 helps connect residents, small businesses, and entertainment hubs across this busy region.
You’ll find 818 covering well-known Valley communities and landmarks, including studios and transit. Major cities and neighborhoods in the 818/747 numbering plan area include:
Statistic: Established 1984; 747 overlay added 2009; 10-digit dialing required (Sources: NANPA; California Public Utilities Commission).
The 818 area code is known for its strong ties to film and TV, with Warner Bros. Studios in Burbank and Universal Studios Hollywood in nearby Universal City. In and around Agoura Hills, the Santa Monica Mountains National Recreation Area and Paramount Ranch offer scenic escapes that share the same local calling area. In 1997, the 626 area code split off from 818 to serve the San Gabriel Valley, while 818 continued to focus on the San Fernando Valley and communities to its west. Today, residents and businesses use both 818 and 747 numbers, and all calls use simple 10‑digit dialing within the region.