Z4
Zoom Airlines
Canada
IATA
Z4
Zulu Four
ICAO
OOM
Radio Callsign
ZOOM
Example: "ZOOM One Two Three" for Z4123
About the "ZOOM" Callsign
When Zoom Airlines pilots communicate with air traffic control, they identify themselves using the radio callsign "ZOOM" followed by the flight number spoken in aviation pronunciation. For example, flight 456 would be "ZOOM Four Five Six." Radio callsigns are assigned by ICAO and are distinct from the airline's marketing name.