Dont the Yanks use "Sam" followed by anything between 3 and 5 numerical digits for anything from a colonel or so upwards?
The transports are mostly "Reach".
Tankers, Awacs and all the other stuff have often got really original and inventive callsigns. Some of the bombers fly under "Death" followed by 2 numerical digits.
I've heard Lear 35 flying under Dowboy, Jallop. Hercs flying as Koo and Talon. Impossible to list them all, as the USAF/Army/Marines are sooo big and have a brazillion planes.