Zip Area Code

Caledonia, Illinois

Caledonia, Illinois, in Boone County, has ZIP code 61011 and area code 815, with 779 as an overlay.

ZIP code
61011
Area codes
815, 779
Time zone
Central Time
Coordinates
42.3835, -88.9185

ZIP codes in Caledonia

ZIP codePost officeCountyArea codes
61011CaledoniaBoone County815, 779

Area codes for Caledonia

  • Area code 815

    In service since 1947. Shares its area with 779. Local calls are dialed with 1 plus ten digits.

  • Area code 779

    In service since March 17, 2007. Shares its area with 815. Local calls are dialed with 1 plus ten digits.

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

Caledonia is in the Central Time zone.

Towns near Caledonia