Nothing registered as N771TE

That is a valid-looking US tail number, but there is no aircraft against it in the registry snapshot on this site. That usually means one of three things: the registration was cancelled — after a sale, an export or a loss — the number is reserved but not yet assigned, or the aircraft was registered after our last import from the FAA.

For a live answer, the FAA's own registry enquiry is authoritative and updated daily.