Morning Alan, unknowns from Saturday:
3FF17B DMAMX D-MAMX Pro.Mecc Freccia
http://www.abpic.co.uk/photo/1460679/ and was mentioned in an article on aerokurier.de on January 21st of 2015.
3FF3AF DMTLR No luck with the details
4407C0 OEGDM no luck with the details OE-GDM was once a RedBull Cessna
5512AD no country allocation either a miscoded airframe or more possible bad packets received
76CEFE nothing more
ABD30B decodes N861F which is currently not assigned/reserved by FAA
Have a nice Sunday!
Ingo