N67NA is taken. It's currently assigned to a Bombardier Inc BD-700-1A11 registered in North Salt Lake, UT.
See the full aircraft record →A tail number only frees up if the owner deregisters the aircraft or moves it to a different N-number — and even then the FAA holds it before releasing it to the public.
N67NA has been worn before. Past registrations from FAA deregistration records:
Tails one nudge away from N67NA that aren't assigned or reserved: