'40s Junction is a commercial-free music channel on the Sirius XM Radio platform, broadcasting on channel 73; as well as Dish Network channel 6073. The channel mainly airs big band, swing, and hit parade music from 1936 to 1949, with occasional songs from the early-1950s. Until May 7, 2015, the station was known as '40s on 4, with programming being broadcast on channel 4, as part of the "Decades" line-up of stations. It was later rechanneled to be nearer to stations featuring similar genres of music, such as jazz and standards. During its first four months on Ch. 73, the station was known simply as '40s. The station was rebranded as 40s Junction on August 13, 2015.