Civil aircraft registration country code prefix

This entry provides the one- or two-character alphanumeric code indicating the nationality of civil aircraft. An aircraft registration number consists of two parts: this alphanumeric code and a registration suffix of one-to-five characters for the specific aircraft. The prefix codes are based on radio call-signs allocated by the International Telecommunications Union (ITU) to each country. Since 1947, the International Civil Aviation Organization (ICAO) has managed code standards and their allocation.