XP
XPTO
Also known as: XPTO
Portugal
IATA
XP
X-ray Papa
ICAO
XPT
Radio Callsign
XPTO
Example: "XPTO One Two Three" for XP123
About the "XPTO" Callsign
When XPTO pilots communicate with air traffic control, they identify themselves using the radio callsign "XPTO" followed by the flight number spoken in aviation pronunciation. For example, flight 456 would be "XPTO Four Five Six." Radio callsigns are assigned by ICAO and are distinct from the airline's marketing name.