Robtex

Up: 23.81.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 23.81.88.0/22
Down right: 23.81.92.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
23.81.88.131	A	ishifushigi.com
23.81.90.2	A+PTR	vm.richardalm.com
23.81.90.2	A	ns1.chewykernel.com
23.81.90.2	A	mail.richardalm.com
23.81.90.9	A	seoeon.com
23.81.90.9	A	windowshostingpro.com
23.81.90.9	A	forexreviewz.com
23.81.90.21	A	ns1.patrolwatch.in
23.81.90.21	A	ns2.patrolwatch.in
23.81.90.24	A	mx1.cloudpostman.com
23.81.90.37	A	mail.quebecsiteinternet.com
23.81.90.37	A	quebecsiteinternet.com
23.81.90.37	A	transavoir.com
23.81.90.47	A	ns1.bmecentral.com
23.81.90.47	A	bmecentral.com
23.81.90.47	A	ns2.bmecentral.com
23.81.90.103	A	ns1.extremesaves.com
23.81.90.103	A	fleet.extremesaves.com
23.81.90.103	A	ns2.extremesaves.com
23.81.90.104	A	mail.escortsgrandrapids.com
23.81.90.104	A	mail.radiumphoto.com
23.81.90.104	A	mail.crashmasters.com
23.81.90.113	PTR	23.81.90.113.rdns.as15003.net
23.81.90.113	A	*.we4x4.com
23.81.90.113	A	rebelmusic.us
23.81.90.121	A	upshon.net
23.81.90.121	A	smtp.trade-setup.com
23.81.90.123	A	phplist.digitalevetoronto.com
23.81.90.128	A	mail.angryfire.net
23.81.90.129	A	ns2.waylyrics.com
23.81.90.129	A	waylyrics.com
23.81.90.129	A	ns1.waylyrics.com
23.81.90.140	A	ns2.richardalm.com
23.81.90.140	A	chewykernel.com
23.81.90.140	A	chriswelzenbach.com
23.81.90.151	A	acera.co
23.81.90.151	A	aceratech.net
23.81.90.151	A	ts3server.co
23.81.90.153	PTR	vince.quarantineko.net
23.81.90.153	A	irontonmacker.com
23.81.90.153	A	mx.irontonmacker.com
23.81.90.163	A	*.attitude-aviation.com
23.81.90.163	A	fbcceredo.com
23.81.90.163	A	www.fbcceredo.org
23.81.90.167	PTR	23.81.90.167.rdns.as15003.net
23.81.90.169	A	ns2.slidefuse.net
23.81.90.169	A	hm3partners.com
23.81.90.169	A	*.slidefuse.net
23.81.90.171	PTR	23.81.90.171.rdns.as15003.net
23.81.90.182	A	ralphlaurenuk.com
23.81.90.183	A	ns2.noheroesstats.com
23.81.90.183	A	noheroesstats.com
23.81.90.183	A	ns1.noheroesstats.com
23.81.90.190	A	mail.mantaswelding.com
23.81.90.195	A	mail.maxhughes.com
23.81.90.195	A	ns2.topcheapinsurance.com
23.81.90.195	A	ronamy.com
23.81.90.200	PTR	23.81.90.200.rdns.as15003.net
23.81.90.209	A	giant.pandabot.net
23.81.90.213	A	globythai.com
23.81.90.213	A	vasilypetrov.ru
23.81.90.218	A	wearemocha.com
23.81.90.218	A	madebyhd.us
23.81.90.223	A	bcsmedical.com
23.81.90.237	A	mx.vaane.com
23.81.90.237	A	vaane.com
23.81.90.243	A	ns2.pathfinderits.com
23.81.90.244	A	ns1.rdnsserver.biz
23.81.90.244	A	rdnsserver.biz
23.81.93.104	A	yourfavoriteitem.info