The station has an adult contemporaryformat and is a member of the Rouge FM (formerly RockDétente) network since June 2005, when a deal was made to transfer ownership of some stations between Corus and Astral. Originally a Corus station, CJOI is now owned by Astral Media.
CJOI-FM's last RockDétente-era logo; used from June 2005 until August 2011
Originally known as CFLP when it opened in 1978 as an AM station on 1000 kHz (and identified itself as "Radio Mille"), the station moved to the FM band in late 2000, due to serious problems in nighttime coverage resulting from a very directional signal necessary to protect WMVP 1000 in Chicago, Illinois. The station switched to its current CJOI-FM call sign when it moved from AM to FM and changed its format from talk radio to adult contemporary (and abandoned its Radiomédia affiliation).