Robtex

Up: 81.201.104.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.201.104.0/25
Down right: 81.201.104.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.201.104.25	A	mail2.avis.de
81.201.104.39	A	proxy.avis.de
81.201.104.54	A	smtprb.avis.de
81.201.104.162	PTR	heman.mainz05.de
81.201.104.162	A	heman.05erarena.de
81.201.104.162	A	heman.05stadion.de
81.201.104.177	PTR	gi3-5.border65-01.fra2.de.telecity.net