Originally Posted by
Mart81
Guys what is giving me a considerable headache is the lack of tail number information online on non-US flights.
Some of them I have been able to trace back through libhomeradar/acarsd (this is a unix project of amateur flight enthusiasts that pick up plane beacon signals and log them), but there are quite a few tail numbers I can't retrace.
Do you know any other way or would it be worthwhile mailing the airlines with the question to have a peek in their history books?
You could try a post on Airliners.net. They've helped me find reg numbers before. The geekier element over there is quite good at such things.