CKOR was first signed on in 1946 by Okanagan Broadcasters Ltd., the owner of Kelowna radio station CKOV, as CKOK, a rebroadcaster of the Kelowna station, at its original frequency of 1450 AM with 250 watts of power. In 1948, CKOK moved to its current spot on the AM dial, and in September that year, became autonomous from CKOV as it began airing its own schedule. In 1950, CKOK increased its power to 1000 watts in the daytime and 500 watts at night. By 1957, CKOK Ltd. was established as the station's owner, and it was an affiliate of CBC Radio's Dominion Network. Two of the principal owners were Maurice Finnerty and Roy Chapman. Chapman eventually relinquished his portion to the Finnerty family. Maurice Finnerty served as Provincial MLA for Okanagan-Similkameen from 1949 to 1952 and was mayor of Penticton from 1962 to 1967. CKOK's daytime power was increased to 10 kilowatts in 1960, and on June 1, 1965, station parent CKOK Ltd. signed on CKOK-FM, which mostly simulcast its AM sister's programming in the beginning. On April 14, 1972, ownership of CKOK, CKOK-FM and parent company Okanagan Radio Ltd. was transferred from the Finnerty family to Fraser Valley Broadcasters Ltd.. With Gerald Pash as the Managing Director, the station was named AM Station of the Year by the British Columbia Association of Broadcasters in 1973. In September 1974 Fraser Valley Broadcasters sold Okanagan Radio Limited to Dennis Barkman, Ken Davis and Gerald Pash. Pash was named BC Associations of Broadcasters "Broadcaster Citizen of the Year" in 1985 and he was Penticton "Citizen of the Year" the same year. CKOK disaffiliated from the CBC in 1977. CKOK-FM changed its call sign to CKOR-FM and in 1986 to its present call sign of CJMG. In 1985, the CRTC granted CKOK permission to move to 780 AM and to increase its power to 20,000 watts in the daytime and 10,000 watts at night, but the station never made the move as it remained at its present frequency and power. In 1988, Okanagan Skeena Group acquired the interest of Barkman and Pash, and then the interest of Ken Davis in 1990. CKOK adopted its present call sign of CKOR in 1991. In 1999, Telemedia purchased Okanagan Skeena Group and its broadcasting assets ; shortly after, CKOR adopted Telemedia's EZ Rock brand. In 2002, CKOR and the other former Okanagan Skeena stations were purchased by Standard Radio, which in turn was purchased on September 27, 2007 by Astral Media, the current owner of CKOR. Bell Media then acquired the stations when it purchased Astral Media.
