ZIP Code 49239
Frontier, Michigan · Hillsdale County
No21744
Zip49239
TypePO BOX
Decommissioned0
Primary CityFrontier
Acceptable Cities—
Unacceptable Cities—
StateMI
LstateMichigan
CountyHillsdale County
TimezoneAmerica/Detroit
Area Codes517
World RegionNA
CountryUS
Latitude41,79
Longitude-84,62