The Russian airline Transaero Airlines also have aircraft with Irish registrations. It's something I've always thought was odd as 90% of these aircraft will never end up within Ireland.
It's the same for the Isle of Mann, there are many 747's, MD-11's, A330's, A340's and 777's on the Manx register, yet all of them are too large to land at the only airport on the Island (Ronoldsway).