Panama city pa abbreviation airport code9/15/2023 ![]() Any correspondence between subnational regions and second letter is also indicated. Structure Map of world regions classified according to the first letter of the ICAO airport code Map of countries classified according to the ICAO airport code prefix. The selection of ICAO codes is partly delegated to authorities in each country, while IATA codes which have no geographic structure must be decided centrally by IATA. Far more aerodromes (in the broad sense) have ICAO codes than IATA codes, which are sometimes assigned to railway stations as well. In general IATA codes are usually derived from the name of the airport or the city it serves, while ICAO codes are distributed by region and country. ![]() IATA codes are commonly seen by passengers and the general public on flight-tracking services such as FlightAware. For example, the IATA code for London's Heathrow Airport is LHR and its ICAO code is EGLL. ICAO codes are separate and different from IATA codes, which are generally used for airline timetables, reservations, and baggage tags. The International Civil Aviation Organization was formed in 1947 under the auspices of the United Nations, and it established flight information regions ( FIRs) for controlling air traffic and making airport identification simple and clear. Flight information regions are also identified by a unique ICAO-code. ICAO codes are also used to identify other aviation facilities such as weather stations, international flight service stations or area control centers, whether or not they are located at airports. ![]() These codes, as defined by the International Civil Aviation Organization and published in ICAO Document 7910: Location Indicators, are used by air traffic control and airline operations such as flight planning. The ICAO airport code or location indicator is a four-letter code designating aerodromes around the world. Not to be confused with IATA airport code. ![]()
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