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The station was originally licensed as KLNQ on November 2, 1998, replacing KUCB-FM after Minority Communications successfully challenged its license in a seven-year battle. It changed its callsign to KJMC on March 1, 1999, when it launched.
KJMC is the Des Moines market affiliate for the Tom Joyner Morning Show and the D. L. Hughley Show. Since KJMC is a non-commercial station, the national commercials are replaced with music, public service announcements and underwriting announcements from local businesses.