I will preface this by saying that yes, I did a search and did not find what I was looking for. I was wondering if there were databases with registration/tail number information for past flights other than BTS. BTS does not have international flights nor all domestic airlines (XJ for example). If no such database exists, could I get some help from some of you privy to such information?

Flights in question (need flight numbers & tail numbers):
Feb 12 2004 NW MSP-YYC arrived 1300ish
Feb 16 2004 NW YYC-MSP departed 1330ish
Jul 21 2005 DL FCO-ATL only flight that day
Mar 4 2006 XJ DTW-CLE departed 0930ish

Thanks for your help!