Robtex

Up: 81.3.26.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.3.27.0/25
Down right: 81.3.27.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.3.27.2	A	s-oo3.oosoft.de
81.3.27.2	A	blackhole.oo-software.com
81.3.27.5	A	mail.xn--wildschnauer-bergbahnen-elc.at
81.3.27.5	A	xn--wildschnauer-bergbahnen-elc.at
81.3.27.6	A	ooandfriends.de
81.3.27.6	A	oo-and-friends.de
81.3.27.6	A	oosoft.com
81.3.27.11	A	hauke.at
81.3.27.14	A	das-geschenk.at
81.3.27.14	A	sm-computer.at
81.3.27.18	PTR	www.lcube.de
81.3.27.18	A	hermann-automation.info
81.3.27.18	A	mail.w-h-i-s-k-y.de
81.3.27.20	A+PTR	mail.lcube.de
81.3.27.20	A	mail.staradworld.net
81.3.27.21	A	lcube-programmierung.de
81.3.27.21	A	lcube-svnhosting.de
81.3.27.21	A	svn-repos.de
81.3.27.22	A	niedersachsenfighter.de
81.3.27.36	A	anzeigenlieferant.de
81.3.27.38	A	fw01.ipfire.org
81.3.27.38	A	ipfire.org
81.3.27.40	A	horneburger-blasorchester.de
81.3.27.40	A	web01.lightningwirelabs.com
81.3.27.40	A	fountainnetworks.com
81.3.27.41	A	tracker.ipfire.org
81.3.27.41	A	source.ipfire.org
81.3.27.41	A	web01-v4only.ipfire.org
81.3.27.42	A+PTR	mail01.ipfire.org
81.3.27.42	A	mail.lightningwirelabs.com
81.3.27.45	A	git.ipfire.org
81.3.27.53	A	ns1.lightningwirelabs.com
81.3.27.66	A+PTR	lw-lr1.lineart.de
81.3.27.66	A	mail.modelltruck.com
81.3.27.66	A	spotlight-stede.com
81.3.27.99	PTR	lw-t1.thuecom-medien.de
81.3.27.99	A	mail.kellerverlag.com
81.3.27.99	A	mail.regio-portal.net
81.3.27.122	PTR	pcp.s1cness.com
81.3.27.122	A	mail.iamdennis.de
81.3.27.122	A	mail.denniswisnia.de
81.3.27.130	PTR	mx02.mfg.uk.siteprotect.com
81.3.27.130	A	mx9.edwardkinnear.co.uk
81.3.27.130	A	mx9.hugapet.co.uk
81.3.27.132	A	fbr02-uk.csee.siteprotect.eu
81.3.27.133	A	smtp.classicstationers.co.uk
81.3.27.133	A	smtp.urquhart.lu
81.3.27.133	A	smtp.pcservicegroup.co.uk
81.3.27.135	A	sitemail.easyhost.com
81.3.27.148	A	mail.mueller-marc.de
81.3.27.150	PTR	twobecomeone.businessp2p.de
81.3.27.150	A	businessp2p.de
81.3.27.150	A	donges.it
81.3.27.153	A	mail.mezzanine-fonds.de
81.3.27.153	A	mezzanine-fonds.de
81.3.27.154	A	cidit.de
81.3.27.154	A	cidit.org
81.3.27.158	A	mailx.gundelbacher.com
81.3.27.194	A	zuerituetsch.ch
81.3.27.194	A	eastprint.ch
81.3.27.194	A	guidoflueck.ch
81.3.27.202	A	privatkredit.postbank.de
81.3.27.214	A+PTR	mail.schoko-sun.de
81.3.27.214	A	berenbrock.net
81.3.27.214	A	schoko-sun.de