773 Area Code is part of 1 counties in the state of Illinois. There are around 1 cities and 2 other places such as towns, cdps and villages in the 773 area code. Area code 773 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Illinois. Below you will find more info about Code and also zip codes, counties, cities and the post offices that belong to this Area Code.
Sources: North American Numbering Plan Administration (NANPA), telecom providers, and the U.S. Census Bureau.