630 Area Code in Illinois, United States

Area code 630 serves the western suburbs of Chicago, including cities such as Naperville, Wheaton, Downers Grove, and Lombard. It was created in 1996 as a split from area code 708 to manage increasing demand in the fast-growing suburban corridor. In 2007, area code 331 was added as an overlay, requiring ten-digit dialing throughout the region. The 630 area is known for its strong commercial base, family-oriented neighborhoods, and access to major highways and commuter rail lines. It continues to be a preferred area for businesses and residents seeking proximity to Chicago with suburban amenities. 630 remains a key part of the telecommunications infrastructure in northeastern Illinois.