Hi,
ADFF0B is in the database as T-38C 64-13206. Supposedly confirmed at Williams, but this appears to be an error or miscode.
ADFF0B is a T-6A Texan II, belonging to 455th FTS which is Pensacola based and uses JEDI callsign. Hex sequence would suggest 95-3009, but unconfirmed as yet.
Edit: FWIW, 64-13206 is a T-38A.