N444 is taken. It's currently assigned to a 1938 Cunningham Hall PT-6F registered in Hood River, OR.
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.
N444 has been worn before. Past registrations from FAA deregistration records:
Tails one nudge away from N444 that aren't assigned or reserved: