Area Code 310 History:
Area code 310 was put into service. Area code 310 was created from a split of area code 213. In 1997 area code 310 was split to form area code 562. In 2006 area code 310 was overlaid with area code 424.
Counties in California within area code 310 include:
Los Angeles County only.
Major cities or places in California within area code 310 include:
Area codes 310 and 424 serve the larger communities of Beverly Hills, Carson, Catalina, Inglewood, Long Beach, Malibu, Marina del Rey, Santa Monica, Torrance, and includes the southwestern portions of Los Angeles County.