ICAO airline designator

Source: Wikipedia. Pages: 24. Chapters: Airline codes-A, Airline codes-S, Airline codes-C, Airline codes-T, Airline codes-P, Airline codes-B, Airline codes-E, Airline codes-M, Airline codes-R, Airline codes-N, Airline codes-F, Airline codes-G, Airline codes-I, Airline codes-L, Airline codes-H, Airline codes-D, Airline codes-J, Airline codes-K, Airline codes-U, Airline codes-V, Airline codes-W, Airline codes-O, Airline codes-Z, Airline codes-Y, Airline codes-0, Airline codes-Q, Airline codes-X, Airline codes-All. Excerpt: A list of all Airline codes. The table lists the IATA airline designators, the ICAO airline designators and the airline call signs (telephony designator). Historical assignments are also included for completeness. IATA airline designators, sometimes called IATA reservation codes, are two-character codes assigned by the International Air Transport Association (IATA) to the world's airlines in accordance with the provisions of IATA Resolution 762. They form the first two characters of the flight number. Designators are used to identify an airline for all commercial purposes, including reservations, timetables, tickets, tariffs, air waybills, and in airline interline telecommunications. There are three types of designator: unique, alpha/numeric, and controlled duplicate. IATA maintains two policies to deal with the limited number of available codes: Controlled duplicates are issued to regional airlines whose destinations are not likely to overlap, in such a way that the same code would be shared by two different airlines. The controlled duplicate is denoted here with an asterisk (*) following the code and in IATA literature as well. The ICAO airline designator is a code assigned by the International Civil Aviation Organization to aircraft operating agencies, aeronautical authorities, and services. The codes are unique by airline which is not true for the IATA airline designator codes. Each aircraft operating agency, aeronautical authority, and services related to international aviation is allocated both a three-letter designator and a telephony designator. The designators are listed in ICAO Document 8585: Designators for Aircraft Operating Agencies, Aeronautical Authorities and Services. An example is: Certain combinations of letters are not allocated to avoid confusion with other systems (for example SOS). Other designators (particularly those starting with Y and Z) are reserved for government organizations. Designator YYY is used for operators that do not have a code