Live Chat I-75 Community Nearby Traffic US Post Office Karns (Amenity postoffice) 2024-05-17 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to US Post Office Karns (Amenity Postoffice) Corryton, TN 14.08 Powell, TN 14.20 Mascot, TN 14.24 Interstate highway exits close to US Post Office Karns (Amenity Postoffice) Exit 8, i640tn 1.21 Exit 392, i40 2.94 Exit 393, i40 3.00 Interstate highways close to US Post Office Karns (Amenity Postoffice) i640tn map 1.21 i40 map 2.94 i75 map 7.54 State roads close to US Post Office Karns (Amenity Postoffice) TN 331 map 2.26 US 441 TN map 3.67 US 70 TN map 3.71