RC-135's E-4 E-6's can be heard on 11175.0 however, most of the time you will hear Mission crew with a day to day different callsign.
Mostly coded messages to/from Andrews.
However, when on transit flight a RC135 might be heard with atc callsign perhaps for Weather Info at their Destination , SNOOP is common transit callsign.
Not sure about E-8, but even on transit they use different callsign each time, with exception of digit which is always 14 (heard once 15)
E-4's on transit, I asume they are in constant in contact with Andrews on a assigned Frequency or even Satcom.
B-1's can be heard while on ferry to/from sandpit. Callsign used : RAMA
(Statesside), recent callsigns heard on HF (credit Al stern, Milradio / HFmonitors) added with some I know to exist