ZIP Code 37921 is located in the county of Knox in the state of Tennessee. 37921 ZIP Code is spread between the coordinates of +35.9777140 Latitude and -83.99567334 Longitude. 37921 ZIP Code is part of the 865 area code. There are 0 postal offices in zip code 37921.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 37921. Always when you mail a package or a letter, be attentive to mention the preferred or acceptable cities. Using any city in the list of unacceptable cities may result in unforseen delays.