ICAO airport code
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An ICAO airport code is a four-letter designation assigned to airports around the world to identify them uniquely. These codes help pilots, air traffic controllers, and aviation professionals communicate clearly about which airport they're referring to during flights and operations.
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Map of the world's ICAO classifications according to the first letter of its ICAO airport code Map of countries classified with ICAO airport code prefixes and subnational regions with their respective second ICAO letter Flag of the ICAO The ICAO airport code or location indicator is a four-letter code designating aerodromes around the world. These codes, as defined by the International Civil Aviation Organization and published quarterly in ICAO Document 7910: Location Indicators, are used by air traffic control and airline operations such as flight planning. ICAO codes are also used to identify other aviation facilities such as weather stations, international flight service stations, or area control centers (and by extension their flight information regions), regardless of whether they are located at airports.
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