<strong>Area code 773</strong> was created in 1996 as a result in split of the area code 312. The code serves the city of Chicago situated in the Illinois State of United States. Standard time zone for all these areas is Central Time Zone. Illinois is East North Central state which is one of the geographic partitions of United States. The division is composed of following five states:
Illinois
Indiana
Michigan
Ohio
Wisconsin.
The City of Chicago has been divided among six area codes:
Code 312 (created in 1947)
Code 630 (created in 1996)
Code 331 (created in 2007)
Code 708 (created in 1989)
Code 773 (created in 1996)
Code 464 (Not implemented yet)
Area code 312 served the entire city of Chicago until 1989. In 1989 area code 312 was split off and created new area code 708. The code 312 got another split in 1996 and created area code 773, 847 and 630. Areas are divided into further smaller areas and are assigned with different codes in order to provide the telephone services efficiently and resourcefully. Areas are assigned with different and unique codes so that the areas can be identified uniquely.
Area code 773 is surrounded from four sides by other area codes as:
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