Robtex

Up: 193.28.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 193.28.72.0/22
Down right: 193.28.76.0/22

IP	Type	Hostname
193.28.72.10	PTR	termsrv1.ham.aero
193.28.72.33	A+PTR	mail3.ham.airport.de
193.28.72.34	A+PTR	mail2.ham.airport.de
193.28.72.34	A	symbios.ham.aero
193.28.72.37	A	mailapp.ham.airport.de
193.28.72.200	PTR	symbios.ham.aero
193.28.79.11	A+PTR	mx-p-gw-01.ham.aero
193.28.79.13	A	mx-p-gw-02.ham.aero