Area Code 657 History:
Area code 657 was put into service. Area code 657 is an overlay of area code 714.
Counties in California within area code 657 include:
Los Angeles County and Orange County.
Major cities or places in California within area code 657 include:
area codes 657 and 714 serves a portion of Los Angeles County, much of northern Orange County and the Chino Hills area in southwestern San Bernardino County including the larger communities of Anaheim, Atwood, Brea, Buena Park, Cypress, Fountain Valley, Fullerton, Garden Grove, Holiday, Huntington Beach, Irvine, Newport Beach, Orange, Placentia, Santa Ana, Silverado, Stanton, Tustin, Westminster, and Yorba Linda in addition to many smaller communities within the area codes 657 and 714 service area.