Mark,
B648D9 is 09-0540, Boeing C-40C, c/n 40706/3512, US - Air Force miscoding
C05EAE decodes to C-GJWF as you state. As far as I am aware the registration is not being used at present.
Two previous holders of the registration
1, now CS-TTS A319 with TAP since 2002
2. now N979KU Bell 412EP since 5/2011
The Canadian registry site is now back online and the registration is not current, possible Bell Helicopter Textron Canada Test Registration ?
Alan