Chicago, Illinois

Where Is Area Code 872?

Area code 872 is in northeastern Illinois. It serves Chicago and nearby parts of Cook County. It is part of the North American Numbering Plan area for the city of Chicago.

Area code 872 covers the same area as area codes 312 and 773 because it is an overlay. The service area includes downtown Chicago and many neighborhoods across the city. It also reaches some nearby communities that use the Chicago rate center area.

This area includes well-known Chicago landmarks and places. These include the Loop, Navy Pier, Millennium Park, and the University of Chicago. The area sits along the southwestern shore of Lake Michigan.

History of Area Code 872

Area code 872 was added on November 7, 2009. The Illinois Commerce Commission approved it as an overlay for the existing 312 and 773 area codes in Chicago. It was created because the city needed more phone numbers.

Chicago's phone system changed several times before 872 arrived. Area code 312 once covered a much larger part of the Chicago area, and area code 773 was created in 1996 as a split from 312 for most of the city outside the downtown core. When 872 launched as an overlay, new numbers in the same geographic area could use 312, 773, or 872.

Key Facts About Area Code 872

• Area code 872 is in Illinois and primarily serves the city of Chicago.
• Area code 872 is in the Central Time Zone.
• Area code 872 is an overlay area code, not an original area code.
• Area code 872 overlays area codes 312 and 773 in the Chicago numbering plan area.
• Area code 872 officially entered service on November 7, 2009.
• The overlay area is centered on Chicago in Cook County, Illinois.
• The area includes major institutions such as the University of Chicago and Northwestern University campuses in Chicago.
• The area includes major landmarks such as the Loop, Millennium Park, and Navy Pier.

Frequently Asked Questions

What state is area code 872 in?

Area code 872 is in Illinois.

What major cities use area code 872?

Area code 872 primarily serves Chicago, and it also covers nearby communities in Cook County that share the Chicago service area.

Is area code 872 a toll-free number?

No. Area code 872 is a geographic area code for Chicago, Illinois.