N480CH is taken. It's currently assigned to a 1998 Boeing 737-72T registered in Miami, FL.
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.
N480CH has been worn before. Past registrations from FAA deregistration records:
Tails one nudge away from N480CH that aren't assigned or reserved: