Robtex

Up: 81.89.255.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 81.89.255.0/26
Down right: 81.89.255.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.89.255.3	PTR	mail.geizkragen.de
81.89.255.3	A	mail.vollversion.com
81.89.255.3	A	mail.softjurycom.de
81.89.255.7	A	s16.foo-server.net
81.89.255.20	A+PTR	s51.foo-server.net
81.89.255.20	A	mail.softjury.de
81.89.255.26	A	mail.my-inventory-manager.com
81.89.255.26	A	my-inventory-manager.com
81.89.255.26	A	www.meininventar.de
81.89.255.31	A	gehaltsrechner.net
81.89.255.32	A	lottozahlen.org
81.89.255.33	A	kugelschreiber.de
81.89.255.33	A	mail.kugelschreiber.de
81.89.255.33	A	www.kugelschreiber.de
81.89.255.41	A	netto-gehalt.de
81.89.255.41	A	kurzarbeitrechner.de
81.89.255.41	A	gehaltsvergleich.de
81.89.255.42	A	www.lovetalk.de
81.89.255.42	A	lovetalk.de
81.89.255.44	A	gehaltserhoehung.de
81.89.255.45	A	herbi2012.de
81.89.255.45	A	mail.herbi2009.de
81.89.255.45	A	mail.herbi2010.de
81.89.255.46	A	content-broker.co.uk
81.89.255.46	A	contentbroker.at
81.89.255.46	A	content-broker.at
81.89.255.52	A	geizchat.de
81.89.255.66	A	domainboosting.de
81.89.255.93	A	www.q-test.de
81.89.255.93	A	counter.foren.de
81.89.255.93	A	q-test.de
81.89.255.97	A	www.razyboard.com
81.89.255.97	A	razyboard.de
81.89.255.97	A	www.foren.de
81.89.255.98	A	geizkragen.ch
81.89.255.98	A	www.geizkragen.de
81.89.255.98	A	geizkragen.de
81.89.255.100	A	geizkragen.net
81.89.255.122	A	softjury.com
81.89.255.122	A	vollversionen.de
81.89.255.122	A	www.softjury.com