The second letter typically identifies a specific country or a distinct sub-region within the larger zone. For example: : United Kingdom (within the Northern Europe "E" zone) ED : Germany (within the Northern Europe "E" zone) LF : France (within the Southern Europe "L" zone) 3. Third and Fourth Letters (Specific Facility)
Even with the PDF in hand, professionals make errors. Avoid these:
You are listening to LiveATC.net and you hear a pilot calling "Speedbird." You check the radar, but the code isn't obvious. You open your Doc 7910 PDF, search for the Telephony term "Speedbird," and you find:
: Contact details and addresses for centers in charge of Flight Information Regions (FIR) and Upper Flight Information Regions (UIR). Why the "Doc 7910 PDF" is Critical for Aviation doc 7910 pdf
Aviation professionals, software developers, and flight simulation enthusiasts frequently look for the PDF version of Doc 7910 for several reasons:
: Lists all ICAO-assigned four-letter codes (e.g., KJFK, EGLL) for geographical locations worldwide. IATA Cross-Reference
(Location Indicators) is a primary aviation reference document that provides a comprehensive list of the four-letter location indicators used globally to identify aerodromes and aeronautical facilities. Key Features of Doc 7910 Four-Letter Indicators The second letter typically identifies a specific country
The data maintained in Doc 7910 forms the backbone of several critical aviation systems: 1. Aeronautical Fixed Telecommunication Network (AFTN)
The safest and most legally compliant way to obtain Doc 7910 is directly through the ICAO Store. ICAO sells the document as a digital PDF or via a subscription-based online database. Organizations must purchase legitimate copies to ensure they comply with international aviation audits. Public Archives and State AIPs
This section organizes the entire database alphabetically by the four-letter ICAO code. It allows users to input a code like and immediately identify it as Macau International Airport. 3. FIR/UIR Identifiers Avoid these: You are listening to LiveATC
ICAO Doc 7910 is the definitive global standard for aerodrome location indicators. The PDF version is an essential reference for anyone involved in international air navigation, providing the authoritative mapping of four‑letter codes to airports and ATC facilities. While not freely distributable, the official PDF can be purchased from ICAO, and individual code lookups are available without charge through various aviation resources.
National governments are responsible for notifying ICAO of any changes to their local aviation facilities. When a new airport opens or an existing facility changes its operational status, the state submits a request to ICAO. These changes are vetted and officially published in the quarterly updates of Doc 7910.