The station was originally licensed by the CRTC in 1984. However, due to financial constraints at the CBC, the station was never launched, and the CBC was forced in 1991 to surrender all of its non-operating licenses. Some sources may incorrectly cite the station's call sign as CBOS-FM, the call sign that was assigned to the unlaunched 1984 license.
The CBC subsequently applied for a new license, which was awarded in 2000. The station went on the air in the spring of 2001, on the same day as CBC Radio 2's CBBS-FM.
On June 29, 2007, the CBC was given approval to add a rebroadcaster of CBBX in Timmins on 105.7 MHz. As of 2011, however, the Timmins transmitter has not been launched. It is currently unknown if the new transmitter at Timmins will be launched. Hearst, Kapuskasing and North Bay are also slated to receive rebroadcast transmitters in the CBC's expansion plan, although no official launch date for these transmitters has been announced or licensed.