Zip Area Code

Colfax, Illinois

Colfax, Illinois, in McLean County, has ZIP code 61728 and area code 309, with 861 as an overlay.

ZIP code
61728
Area codes
309, 861
Time zone
Central Time
Coordinates
40.5704, -88.6200

ZIP codes in Colfax

ZIP codePost officeCountyArea codes
61728ColfaxMcLean County309, 861

Area codes for Colfax

  • Area code 309

    In service since 1957. Shares its area with 861. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 861

    In service since February 24, 2023. Shares its area with 309. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

Colfax is in the Central Time zone.

Towns near Colfax