CKDK-FM is a radio station owned by Corus Entertainment and licensed to the city of Woodstock, Ontario, Canada but primarily serves London, Ontario, Canada and transmits at 51,000 watts at 103.9 MHz on the FM dial. The station airs a country music format branded as Country 104. Until August 2008, the station primarily played classic rock; it afterward evolved to a 1960s-1980s oldies/classic hits playlist, but eventually settled into an adult hits format under the branding More 103.9. The format change to country music took place on February 28, 2014.