If you are a pilot, an air traffic controller, a flight dispatcher, or simply an aviation enthusiast who spends time analyzing flight plans, there is one document that sits on the virtual desk of almost every professional in the industry: .
You can find the official key to these prefixes exclusively in the DOC 7910 PDF. doc 7910 pdf
Aviation changes constantly. Airports close, open, or are renamed. This section prevents pilots from using outdated codes in flight plans. If you are a pilot, an air traffic
ICAO Doc 7910, Location Indicators , is a quarterly updated, four-letter coding system essential for global aeronautical flight planning, air traffic management, and telecommunications. While the 199th edition is available for purchase directly through the ICAO Store Airports close, open, or are renamed
: By providing a single, authoritative source for location data, it prevents confusion between airports with similar names in different countries. Seamless Communication : The codes within Doc 7910 are used in the Aeronautical Fixed Telecommunication Network (AFTN)