Doc 7910, Location Indicators. Edition No. 190, December 2023.
This document contains a list of ICAO four-letter location indicators and, for ease of reference, corresponding three-character International Air Transport Association (IATA) location identifier codes for geographical locations throughout the world. Also included is a list of addresses of centres in charge of flight information regions (FIRs) and/or upper flight information regions (UIRs).
Stability in location indicators assigned is important, hence changes should be made only after due consideration.
This document is published quarterly as a service to international aviation. Any errors or omissions should be brought to the attention of the Secretary General of ICAO, 999 Robert-Bourassa Boulevard, Montréal, Quebec, Canada H3C 5H7.
