The Canadian government has issued call letters to its own stations that do not conform to the international call letter assignments for Canada. At first the stations were run by the Canadian National Railway, and used CNR- calls (which technically should be issued in Morocco). In 1933, the Canadian Radio Broadcasting Commission was set up, and the calls were changed to CRC- calls (which technically should be issued in Portugal). Ultimately the name of the operator was changed to the Canadian Broadcasting Corporation, and the calls were changed to CB- calls (which technically should be issued in Chile). The countries involved have allowed Canada to use those calls, without any sort of protest.
3- and 4-letter C calls
4-letter V calls