Robtex

Up: 153.96.224.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 153.96.224.0/23
Down right: 153.96.226.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
153.96.224.131	PTR	gandalf.ita.fraunhofer.de
153.96.224.131	PTR	gandalf.item.fraunhofer.de
153.96.226.5	A+PTR	cnso.ime.fraunhofer.de
153.96.226.6	PTR	refesol.de
153.96.226.6	PTR	infoserver.ime.fraunhofer.de
153.96.226.6	A+PTR	www.refesol.de