# Tail numbers not starting with N, with domestic US carriers?

I'm looking at some of the on-time performance data made public by the US Bureau of Tranport Statistics, e.g. through here. These have the tail numbers of the aircraft used in commercial intra-US flights over the years.

I'm seeing that, occasionally, tail numbers are missing. But in some cases they're actually garbled (e.g. N105@@) - or just perhaps uncommon. Specifically, I'm seeing, among others, tail numbers such as:

89869E
91469E
9149E
A367NW
EI-BWD
HZO
M67153


Can some of these be "legit"? That is, could the above (and similar) strings be actual tail numbers of aircraft which were used in commercial domestic US flights?

Note that we're talking about entries from years between 2001 and 2008.

• Nearly all countries’ tail numbers start with an ITU prefix, and EI- is for Ireland. The others all appear to be garbage data. – StephenS Oct 23 '20 at 23:05
• This question seems closely related and might answer your question? At least about whether it’s possible for non-US aircraft to be used in domestic commercial operations. – Pondlife Oct 23 '20 at 23:06
• @Pondlife: It might explain one (or some?) of the tailnums, but not all of them I think. – einpoklum Oct 23 '20 at 23:07
• A367NW looks garbled. There's an N367NW which is a former Northwest Airlines A320. – jwenting Oct 24 '20 at 20:47
• To get better answers, you might like to clarify if you're asking a) if it's possible that non-US aircraft are being used for domestic commercial flights (already answered in the question I linked to); b) if the specific tail numbers you listed are, were or could be real; or c) something else? – Pondlife Oct 26 '20 at 15:52

Yes, these can be legit. For example, EI- means the aircraft is registered in Ireland. Others look corrupt, though. HZ-AAA is Saudi Arabia, but your HZ example looks too short. The examples starting with four numbers don't match any country's pattern.