Originally Posted by
ridefar
i was told there are 5. I thought they all operated in the West. I could easily be wrong on both counts as the information came from a gate agent.

You may well be right on the number! My info also comes from a GA but I may remember '4' when in fact she said '5'!
That being said, I can confirm they sometime find their way in the East as I have flown on them at least twice in 2017 between YYZ (or was it YUL?) and YQB.