N701 is taken. It's currently assigned to a 1990 Partenavia Spa P.68 OBSERVER 2 registered in Boise, ID.
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.
Tails one nudge away from N701 that aren't assigned or reserved: