CBD-FM was launched on October 15, 1964 at 1110 AM. Prior to its launch, CBC Radio programming was aired on private affiliate CHSJ. A simulcast on 91.3 FM began on May 13, 1981 before the AM transmitter was shut down in September 1988.
CBD-FM currently produces the news and current-affairs program, Information Morning Saint John.
On June 11, 2013, the CBC submitted an application to the CRTC to convert CBAO 990 to 88.1 FM; this application was approved on November 6, 2013. On July 3, 2014, the CBC received approval from the CRTC to change CBD-FM-1's frequency to 106.3.