Before CHR made its 2006 debut in the Burlington-Fort Madison area on 97.3, the station was known as KKNL (KKNew London). KKNL was actually a simulcast of 93.5 KKMI to provide a better signal to Mount Pleasant, as the 93.5 signal is hard to receive in the Mount Pleasant Area. The simulcast lasted for four years, until late-2005 when KKNL broke away from KKMI, emerging as the Tri-States New Hit Music Channel: Hot 97 dot 3.
Hot 97.3 syndicates numerous radio shows. "Kidd Kraddick in the Mornings" is the stations flagship syndicated show. On the weekends they also syndicate "Rick Dees Weekly Top 40", "Hollywood Hamilton Weekend Top 30", and "The Hollywood 5".
Matthew Brown (known on air as Lil' Matt) is the current KHDK Program Director. Other members of the KHDK Airstaff include Johnny B and Mikey J, the latter of which has been with the station since it signed on with a CHR format in 2005.