CKCX are the call letters used for the Canadian Broadcasting Corporation

Canadian Broadcasting Corporation

The Canadian Broadcasting Corporation, commonly known as CBC and officially as CBC/Radio-Canada, is a Canadian crown corporation that serves as the national public radio and television broadcaster...

's shortwave

Shortwave

Shortwave radio refers to the upper MF and all of the HF portion of the radio spectrum, between 1,800–30,000 kHz. Shortwave radio received its name because the wavelengths in this band are shorter than 200 m which marked the original upper limit of the medium frequency band first used...

 transmitter complex near Sackville, New Brunswick

Sackville, New Brunswick

Sackville is a Canadian town in Westmorland County, New Brunswick.Mount Allison University is located in the town...

 at the Tantramar Marshes

Tantramar Marshes

The Tantramar Marshes is a National Wildlife Area on the southern part of the Isthmus of Chignecto, which joins Nova Scotia to New Brunswick and the Canadian mainland. It is the site of the historic Battle of Fort Beauséjour, the final chapter in the long battle for Acadia by the British and French...

. The Sackville Relay Station is operated by Radio Canada International

Radio Canada International

Radio Canada International is the international broadcasting service of the Canadian Broadcasting Corporation . Until 1970, it was known as the CBC International Service and was sometimes referred to as the "Voice of Canada" in its early years.- The early years :The idea for creating an...

 and broadcasts its programming around the world as well as relay transmissions from several foreign shortwave broadcasters. Domestically, it transmits broadcasts on 9625 kHz to northern Quebec by CBC North

CBC North

CBC North is the name for the Canadian Broadcasting Corporation's radio and television service in the Canadian Arctic. Originally known as the CBC Northern Service, its first operations began in 1958 with radio broadcasts including the takeover of CFYK, originally a Royal Canadian Signal...

, the James Bay Cree Communications Society and Taqramiut Nipingat

Taqramiut Nipingat

Taqramiut Nipingat is a Canadian radio network, which broadcasts community radio programming in Inuktitut to 14 communities in the Nunavik region of Quebec....

, the Inuit communications society of the Nunavik

Nunavik

Nunavik comprises the northern third of the province of Quebec, Canada. Covering a land area of 443,684.71 km² north of the 55th parallel, it is the homeland of the Inuit of Quebec...

 region of northern Quebec. The CKCX designation was assigned after CBC Radio's CBA, under whose licence the Sackville complex originally operated, moved to Moncton.

On May 5, 2008, the CBC proposed to add three additional shortwave frequencies (7310 kHz, 7325 kHz and 7345 kHz). The CBC advises that the frequencies will be used a few hours a day and only during certain months of the year. This application was approved on June 26, 2008.