CKCX was the call sign used for the Canadian Broadcasting Corporation's shortwave transmitter complex near Sackville, New Brunswick at the Tantramar Marshes.

[1] The CKCX designation was assigned after CBC Radio's CBA, under whose licence the Sackville complex originally operated, moved to Moncton in 1968.

Radio Canada International's shortwave service was shut down in June 2012 due to Canadian Broadcasting Corporation budget cuts as a result of reduced federal subsidies.

[3] The site, however, continued to be used until December 1, 2012, for transmission of CBC's Northern Quebec service until the installation of several low power transmitters in the target region could be completed.

[5] RCI's parent, the Canadian Broadcasting Corporation, was the owner and operator of the Sackville transmission site, call sign CKCX.

Sackville was the only high power shortwave relay station in Canada and also transmitted CBC North broadcasts to northern Quebec.