Zip Area Code

Area code 773

Area code 773 is an Illinois area code, in service since October 12, 1996.

It was added as an overlay on 312: both codes serve the same area, so neighbors can have numbers in either one.

872 serves the same area too.

Local calls are dialed with 1 plus ten digits.

It is in the Central Time zone.

In service since
October 12, 1996
Overlays
872
Local dialing
1 plus ten digits
Time zone
Central Time
ZIP codes
41

Map

Map of the 773 area codeThe shaded area shows where 773 numbers are rated, with the neighboring area codes outlined around it.219630815847708312Chicago
Approximate 773 coverage, drawn from U.S. Census ZIP code areas and NANPA rate centers. Dashed lines are state borders.

Main cities in area code 773

Overlays and neighboring area codes

Overlay, serving the same area: 872.

Neighboring area codes: 219, 630, 815, 847, 708, 312.

Counties in area code 773

Towns in area code 773