Station	On Air	Change	Change	Change	Change	Change	Notes
CKCH Ottawa	Feb. 27, 1924	becomes CNRO July, 1924	becomes CRCO 1933	becomes CBO AM 920  1936	moves to FM 91.5 February 28,1991		CBC Radio One
CKCO  Ottawa	May 1, 1924	becomes CKOY June 1, 1949	becomes CIWW -AM (W1310) 1986	becomes Oldies 1310 1995			Rogers Sister to Y105
CKCH AM 970 Hull	1933	Signs off  Sept.30, 1994					Radio Mutuel / Telemedia consolidate holdings - end of AM
CFRA AM 580  Ottawa	May 3, 1947	becomes News/Talk June 7, 1993					CHUM Inc. Sister to KOOL
CJET AM 630 Smiths Falls	Oct. 22, 1955						Rideau Broadcasting bought by CHEZ Inc. 1984
CBO - FM Ottawa	1964	Becomes 103.5 FM ???	becomes CBOQ FM February 28,1991				CBC Radio Two
CBOF Ottawa AM 1250	1964	moves to FM 90.7 February 28,1991					SRC La Première Chaîne
CFMO Ottawa FM 93.9	1965	becomes KOOL-FM August 28, 1992 (see below)					CHUM sells format/call letters to CHEZ with CRTC approval
CJET - FM Smiths Falls  FM 100.1	1967	becomes CKUE 1973  (the change indicated a move to distinct programming, from simulcasting and automation.)	becomes CHEQ (Q101) Sept. 14, 1984  (after sale to CHEZ FM Inc.)	becomes FM Country 101 January 1, 1991	becomes "new" CFMO March 1,1993  (CHEZ Inc. acquires format and call letters after creation of KOOL-FM)	becomes Lite 101 Sept. 30,1996	CHEZ Inc.
CKBY -FM  Ottawa FM 105.3	1968	becomes Y105 Young Country September 1995					Rogers Buys from Maclean-Hunter 1995 Sister to Oldies 1310
CKPM Ottawa AM 1510	1972	becomes CFGO AM 1440  c.1976	moves to AM 1200 Jan. 5, 1986	becomes Energy 1200 March 8, 1988	becomes The Buzz 1200 August 28, 1997	becomes OSR Ottawa Sports Radio Sept. 9, 1998	Rawlco buys in 1988
CKCU  Ottawa FM 93.1	Nov. 15, 1975						Carleton University First (with CJUM Winnipeg) Campus-Community station in Canada
CIMF Hull  FM 94.9	1976						Telemedia
CHEZ  Ottawa FM 106.1	March 25, 1977	becomes Classic Rock June 1994					CHEZ Inc. holdings sold to Rogers  1999 ??
CJSB  Ottawa AM 540	August 31, 1982	becomes 54 Rock 1989	signs off August 31, 1994 (Becomes The Bear)				Standard Broadcasting
CKO  Ottawa FM 99.1	1983	Signs off 1988	(99.1 FM now belongs to CHRI)				First Canadian All-News network
CBOF-FM  Ottawa FM 102.5	???	becomes CBOX-FM February 28,1991					SRC La Chaîne culturelle
CKTF Gatineau  FM 104.1	1987						Radio Mutuel
CHUO  Ottawa FM 89.1	May 31, 1991						University of Ottawa
CJMJ Ottawa FM 100.3	August 31, 1991	known as Majic 100 since sign-on					Rawlco  Sister to OSR
CKKL  Ottawa FM 93.9	August 28, 1992	(CFMO becomes KOOL-FM)					CHUM Inc.
CKQB  Ottawa FM 106.9	Sept. 1, 1994	known as The Bear  since sign-on (54 Rock AM signs off day before)					Standard Broadcasting Formerly 54 Rock
CKDJ  Ottawa FM 96.9	October, 1994						Algonquin College  Instructional
CHRI  Ottawa FM 99.1	March 30, 1997						Religious Christian 50% Commercial 50% Non-Profit