Zip Area Code

Frederick, Illinois

Frederick, Illinois, in Schuyler County, has ZIP code 62639 and area code 217, with 447 as an overlay.

ZIP code
62639
Area codes
217, 447
Time zone
Central Time
Coordinates
40.0700, -90.4290

ZIP codes in Frederick

ZIP codePost officeCountyArea codes
62639FrederickSchuyler County217, 447

Area codes for Frederick

  • Area code 217

    In service since 1947. Shares its area with 447. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 447

    In service since March 27, 2021. Shares its area with 217. 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

Frederick is in the Central Time zone.

Towns near Frederick