Editing ICAO airport code (section)

{{Short description|Four-letter code designation for aviation facilities around the world}}
{{For|a list of airports by ICAO code|Lists of airports#By ICAO code}}
{{Distinguish|IATA airport code}}
[[File:ICAO FirstLetter.svg|thumb|Map of the world's ICAO classifications according to the first letter of its ICAO airport code]]
[[File:ICAO-countries.png|thumb|Map of countries classified with ICAO airport code prefixes and subnational regions with their respective second ICAO letter]]
[[File:Flag of ICAO.svg|right|thumb|Flag of the ICAO]]
The '''ICAO''' '''airport code''' or '''location indicator''' is a four-letter [[code]] designating [[aerodrome]]s 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 station]]s, international [[flight service station]]s or [[area control center]]s, regardless of whether they are located at airports. [[Flight information region]]s are also identified by a unique ICAO-code.