The University of Northwestern - St. Paul in Roseville, Minnesota owns a series of Christian radio stations in about 8 cities throughout the upper midwest.
KNWI - Des Moines/Osceola, Iowa
KFNW - Fargo, North Dakota
WNWC - Madison, Wisconsin
KNWS - Waterloo, Iowa. Also heard on translator 96.9 FM K245AZ in Dubuque, IA.
KNWC - Sioux Falls, South Dakota
More stickers from sister-station KTIS can be seen here. And one from KDNI here.