Doc 7910 Pdf [updated] Page

ICAO Doc 7910, "Location Indicators," provides standardized four-letter codes for global aviation facilities, updated quarterly for accurate flight planning. As of the March 2026 199th edition, it includes IATA cross-references, FIR/UIR addresses, and is published in four languages. Purchase the document via the ICAO Store .

• Designator: SWA → Telephony: Southwest
• Designator: KLM → Telephony: KLM
• Designator: JBU → Telephony: JetBlue

Q3: Can I use DOC 7910 to find IATA (three-letter) codes?

Official Access:

It must be purchased directly via the ICAO Store or licensed distributors. doc 7910 pdf

Conclusion

Unlike IATA codes (which are often abbreviations of the city name), ICAO location indicators are strictly geographic and hierarchical. They are formulated according to rigid rules maintained by ICAO. A standard ICAO code is broken down by region: Designator: SWA → Telephony: Southwest Designator: KLM →

first letter

The is a region, assigned by ICAO: