Montreal ACC is located in a building on the outskirts of Montréal–Pierre Elliott Trudeau International Airport.
From this ACC, air traffic controllers provide en route and terminal control services to aircraft in the Montreal Flight Information Region (FIR).
The Montreal FIR airspace covers the entire province of Quebec (with the exception of the Bagotville Military Terminal Control Area), parts of eastern Ontario, the eastern shore of James Bay, Hudson Bay, the western section of Newfoundland and Labrador and the Nunavut region that includes Iqaluit.
[1] The Montreal FIR is bordered by 6 Flight Information Regions.
Within each FIR, there are transmitter sites that allow the relay of distant communication from aircraft back to the ACC.