What is 657 area code?

Area code 657 is a telephone area code in the North American Numbering Plan (NANP) that serves parts of Southern California. It was introduced as an overlay for area code 714, which means it covers the same geographic region. This area includes northern and central Orange County, including cities like Anaheim, Santa Ana, Huntington Beach, Fullerton, and Orange.

The overlay was implemented to accommodate the growing demand for new phone numbers in the region. With the introduction of an overlay, residents and businesses in the area must dial the full 10-digit phone number (area code + seven-digit number) for all local calls. The introduction of the 657 area code was part of a broader effort to ensure there are enough numbers available for residents and businesses in rapidly growing regions.