Civil Aircraft
List of Official Aircraft Registers Worldwide [Another source] [Another Source]
AIRFRAMES.ORG – Aircraft Database
FAA Registry – Aircraft – N-Number Inquiry
Planefinder Aircraft Database Search
Databases – Scramble (Military & Civillian Worldwide)
Gatwick Aviation Society Database Search
“Spotters” (Special Over The Top Email Request System) Global Registration Database
Military Aircraft
On Dutch Wings Database Online
Databases – Scramble (Military & Civillian Worldwide)
“BanterOps” Blog – List of Lakenheath Based Aircraft Registrations