Robtex

Up: 193.105.52.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 193.105.52.0/25
Down right: 193.105.52.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.105.52.17	A+PTR	smtp1.wolff-mueller.de
193.105.52.18	A+PTR	smtp2.wolff-mueller.de
193.105.52.49	A	wm-argen.de
193.105.52.49	A	wm-digibox.de
193.105.52.49	A	wolff-mueller.net