Hi there,By using link underneath you can find a whole list of airlines andVA airlines, with there respective radio callsigns and the three letter ICAO code to be used in your flight plan.For example I am flying for Eurostar VA, so my radio callsign is "Eurostar 228" in my flightplan it will be ESA228. A lot of pilots do mistake the Iata two letter abbreviations instead of the ICAO three letter abbreviation i.e. KL123 (IATA) instead of KLM123 (ICAO)Hope this helps,Best regards,Niekhttp://www.whatreallycounts.net/vacallsigns/