Hi Ingo,
D-ELSC and D-D-EDTO and N600GK are already in the d/b
45CAB5 comes out at OY-RUU unknown
440402 unknown
HB-IXM is as you state, checked the online Swiss register and unknown so doesnt appear to have been re-issued
400719 comes out as G-OABE which is now JA391K B734 with Solaseed Air, no I hadnt heard of them either. New name for Skynet Asia.
49D0A6 I am informed is 737 OK-CCB c/n 24813/2062 ex Aegean SX-BLM
Thanks and regards
Alan