Located in the Central (GMT -06:00) time zone. Area code 872 serves the state of Illinois. This area code was assigned on July 23rd, 1999. On November 7th, 2009 it went into service. 872 is a General Purpose Code. 872 service area does overlap with 312 773 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.