Originally Posted by Gunni

Further, the planes that hit the World Trade Center towers were flights 11 and 175. There is and has never been a flight "Q33NY." In fact, that sequence doesn't fit any valid flight numbering system in use by any airline or airport. Neither is it, as various versions of this chain suggest, the tail number of one of those planes, the highway on which the WTC towers sat nor some reference to a passage in the Koran.

http://www.breakthechain.org/exclusives/q33ny.html