ICAO Doc 7910, "Location Indicators," is an authoritative, data-heavy reference manual providing the global directory for four-letter codes assigned to airports and aeronautical facilities. It structures data by country/region, including location indicators, IATA codes, and flight information region (FIR) addresses to support air traffic management and flight planning. To access the most current official version of the manual, visit the ICAO Store . 7910 Location Indicators | PDF | Civil Aviation - Scribd
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Aviation changes constantly. Airports close, open, or are renamed. This section prevents pilots from using outdated codes in flight plans. ICAO Doc 7910, "Location Indicators," is an authoritative,