To aid in reducing callsign confusion with Jazz flights, a couple of years ago, the 8 at the start of the flight number (and if the 8 were followed by a 0, the 0) was removed from the ATC callsign but not the flight number. JZA8029 became JZA29 and JZA8666 became JZA666.
Just have to get to grips with those starting with 7 now:
JZA 7779, 7797, 7739, 7793, 7939 etc.
