Free tool
Look up any US tail number.
The FAA registration, the type certificate behind it, the engine on file, and the specification that model usually carries. No account needed.
Registration
Owner of record, serial number, status and the certificate dates on file.
Type certificate
The TC data sheet behind the model, and who holds it.
Engine
The engine make, model and rating as registered against the airframe.
Specification
Published performance and dimensions typical for that model.