CKCK-FM 94.5 Jack- Regina, SK

CKCK-FM is a radio station in Regina, Saskatchewan. Owned by Rawlco Communications, it broadcasts an adult hits format branded as Jack 94.5. CKCK's studios and offices are located at 2401 Saskatchewan Drive in Regina, along with sister stations CJME and CIZL-FM.

CKCK was an affiliate of the Canadian Radio Broadcasting Commission from 1933 to 1936 when it affiliated with the newly formed Canadian Broadcasting Corporation. It remained a CBC affiliate until 1962 when the Trans-Canada Network was dissolved into CBC Radio. The Siftons obtained a television station licence, and signed CKCK-TV on the air in 1954.

CKCK's old AM signal signed off the air at 11:59 p.m., on November 30, 2001. The final song played on "Kool" was "Last Song" by Edward Bear.Rawlco relaunched CKCK on 94.5 FM with test broadcasts in June 2002. It formally relaunched on August 9 with the branding Rock 94. On July 29, 2005, the station was rebranded as 94.5 Jack FM, becoming the first Canadian radio station not owned by Rogers Communications to adopt that brand identity.