N449 is taken. It's currently assigned to a 1969 Cessna 180H registered in Los Angeles, CA.
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.
N449 has been worn before. Past registrations from FAA deregistration records:
Tails one nudge away from N449 that aren't assigned or reserved: