Originally Posted by
YEG_SE4Life
With the AC Andriod app, when you bring up the flight. Go to the aircraft type, the FIN is in brackets behind the type.
The Apple version of the app has been updated to display FINs as well.
I keep a close eye on YYJ-YVR FINs as an early warning system for those tiny-binned DH4s, but this route seems to always be swapping aircraft, so you don't know for sure until you're boarding the a/c.