#ITU Zones

ITU zones are the 90 numbered regions defined by the International Telecommunication Union, and they are used as the exchange item in contests such as the IARU HF Championship. They are a separate system from the 40 CQ zones used in CQ WW DX, with different boundaries and numbers. A country can have one number in the ITU system and a completely different one in the CQ system. Large countries are divided between several ITU zones, so the zone depends on where the station really is. Articles under this tag explain how to find the right zone and how to avoid mixing the two systems.