Zip Area Code

De Kalb, Missouri

De Kalb, Missouri, in Buchanan County, has ZIP code 64440 and area code 816, with 975 as an overlay.

ZIP code
64440
Area codes
816, 975
Time zone
Central Time
Coordinates
39.5834, -94.9270

ZIP codes in De Kalb

ZIP codePost officeCountyArea codes
64440De KalbBuchanan County816, 975

Area codes for De Kalb

  • Area code 816

    In service since 1947. Shares its area with 975. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 975

    In service since October 13, 2023. Shares its area with 816. 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

De Kalb is in the Central Time zone.

Towns near De Kalb