The station first signed on in 1962 as CKY-FM simulcasting AM 580CKY. The station adopted its current call sign, CITI-FM, on April 1, 1978, broadcasting at 360,000 watts, making it the most powerful FM radio station in North America. The first song played on CITI-FM was Deep Purple's Highway Star. In the early 1990s, the station was acquired by Rogers Radio, who converted CITI's sister station CKY-AM to the FM band in 2004, and retained the CKY call sign on that station. That station now plays adult contemporary music. CITI-FM was originally North America's most powerful commercial FM station. In 2003 CITI-FM was granted a decrease in effective radiated power from 210,000 to 100,000 watts. Its transmitter was then relocated 20 kilometers north of its former site. Some notable announcers through the years at CITI are: Ross Porter, Brother Jake Edwards, Terry Klassen, Terry Dimonte, Andy Frost, Howard Mandshein, Craig Thulner, Tim "Trucker" Bradley, Gordo Fry, Lamont Hollywood, Shadoe Davis, Tom McGouran, Larry Updike, Joe Aiello, Brian Cook and Cosmo. On May 17, 2012, the station rebranded itself as "World Class Rock" and began playing more 80's, 90's and 2000's-based rock. On September 13, 2012, CITI-FM announced that longtime morning show hosts Tom McGouran and Joe Aiello had been let go, and would be replaced with Dave Wheeler, Phil Aubrey and Rena Jae, formerly of rival station CJKR-FM. The latter three, having comprised the morning show of Wheeler In The Morning with Philly and Rena since September 2009, were unable to come to terms on a new contract with CJKR-FM's parent company, Corus Entertainment, and were subsequently approached by Rogers Media, parent company to CITI-FM. On January 12, 2015, the station's morning show Wheeler in the Morning began to be simulcast on sister Citytv station CHMI-DT. The simulcast replaced the cancelled Winnipeg version of Breakfast Television. The former Breakfast Television presenters Jenna Khan and Drew Kozub host news and entertainment segments that are shown in place of music programming. On July 6, 2016, the station rebranded as "92.1 CITI", using a new standardized branding used by most Rogers rock stations.
