where is 872 area code located
Area code 872. The 872 area code belongs to the state of Illinois (IL) and it covers the city of Chicago and its greater area (O'Hare Airport, Harwood Heights, etc).This code was introduced on Nov 7, 2009 to overlay both 312 and 773 Illinois area codes covering downtown Chicago and its surroundings respectively.rea code 872. The 872 area code belongs to the state of Illinois (IL) and it covers the city of Chicago and its greater area (O'Hare Airport, Harwood Heights, etc).