618 Area Code
Southern Illinois, Illinois
Area code 618 is located in Southern Illinois, Illinois. It covers Belleville, East St. Louis, and surrounding areas in the Central time zone (UTC-6). Administered by NANPA.
Where is area code 618?
Area code 618 is located in Southern Illinois, Illinois. It covers Belleville, East St. Louis, and surrounding areas in the Central time zone (UTC-6).
Cities Covered by Area Code 618
Area code 618 primarily serves the Southern Illinois area of Illinois. The exact coverage includes Belleville, East St. Louis, and Carbondale, along with surrounding communities and suburbs.
Time Zone
Central Time — UTC-6
Area code 618 operates in the Central Time Zone. When calling 618 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 618
Area code 618 was introduced in 1957 as a geographic area code serving Southern Illinois, Illinois. It remains the primary area code for this region. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.