Zip Area Code

Eldorado, Ohio

Eldorado, Ohio, in Preble County, has ZIP code 45321 and area code 937, with 326 as an overlay.

ZIP code
45321
Area codes
937, 326
State
Ohio
Time zone
Eastern Time
Coordinates
39.8882, -84.6786

ZIP codes in Eldorado

ZIP codePost officeCountyArea codes
45321EldoradoPreble County937, 326

Area codes for Eldorado

  • Area code 937

    In service since September 28, 1996. Shares its area with 326. Local calls are dialed with ten digits.

  • Area code 326

    In service since March 8, 2020. Shares its area with 937. Local calls are dialed with 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

Eldorado is in the Eastern Time zone.

Towns near Eldorado