Robtex

Up: 72.232.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.232.44.0/23
Down right: 72.232.46.0/23

IP	Type	Hostname
72.232.44.6	A	6.44.232.72.static.reverse.ltdomains.com
72.232.44.20	PTR	no-dns-yet.com
72.232.44.29	A	29.44.232.72.static.reverse.ltdomains.com
72.232.44.36	A	ns2.avesena.net
72.232.44.46	PTR	porrima.willbarton.com
72.232.44.58	PTR	wnetve.com
72.232.44.82	A	82.44.232.72.static.reverse.ltdomains.com
72.232.44.82	A	edgespeakersonline.com
72.232.44.89	A	89.44.232.72.static.reverse.ltdomains.com
72.232.44.101	PTR	101.44.232.72.static.reverse.ltdomains.com
72.232.44.101	A	lemanie.net
72.232.44.101	A	lemanie.org
72.232.44.146	PTR	s2.xtracker.us
72.232.44.171	A+PTR	171.44.232.72.static.reverse.ltdomains.com
72.232.44.171	A	tp1.hostrightnow.com
72.232.44.189	A	189.44.232.72.static.reverse.ltdomains.com
72.232.44.212	A	ns2.er7.com.br
72.232.44.242	PTR	youhost.name
72.232.44.243	PTR	youhost.name
72.232.44.244	PTR	youhost.name
72.232.44.245	PTR	youhost.name
72.232.44.246	PTR	youhost.name
72.232.44.250	PTR	outlook.texasnoc.com
72.232.45.28	PTR	sf8.sslsite.com
72.232.45.41	A	41.45.232.72.static.reverse.ltdomains.com
72.232.45.58	A	58.45.232.72.static.reverse.ltdomains.com
72.232.45.64	A	64.45.232.72.static.reverse.ltdomains.com
72.232.45.106	A	stimpysbutt.stimpysbutt.net
72.232.45.131	PTR	baka-updates.com
72.232.45.132	PTR	manga.baka-updates.com
72.232.45.146	PTR	ns2.geekniche.com
72.232.45.147	PTR	ns1.geekniche.com
72.232.45.148	A	148.45.232.72.static.reverse.ltdomains.com
72.232.45.184	A	offerserv89.123greetings.biz
72.232.45.189	A	offerserv94.123greetings.biz
72.232.45.199	A	ns2.iloopmobile.com
72.232.45.212	A	212.45.232.72.static.reverse.ltdomains.com
72.232.45.213	A	213.45.232.72.static.reverse.ltdomains.com
72.232.45.218	PTR	zinov.com
72.232.45.220	PTR	tagtuner.com
72.232.46.3	PTR	ns1.bootcamp.la
72.232.46.13	A	13.46.232.72.static.reverse.ltdomains.com
72.232.46.19	PTR	19.46.232.72.static.reverse.ltdomains.com
72.232.46.90	A+PTR	argon.jadedpixel.com
72.232.46.90	A	jagpublications-esl.com
72.232.46.90	A	seattleedge.com
72.232.46.101	A	101.46.232.72.static.reverse.ltdomains.com
72.232.46.137	A+PTR	137.46.232.72.static.reverse.ltdomains.com
72.232.46.137	A	ns1.contentomedia.com
72.232.46.158	A	158.46.232.72.static.reverse.ltdomains.com
72.232.46.162	A+PTR	east3.edas.info
72.232.46.162	A	db.edas.info
72.232.46.169	A	169.46.232.72.static.reverse.ltdomains.com
72.232.46.194	A	ns3.ff-host.com
72.232.46.205	PTR	venus.mailengineer.com
72.232.46.232	A	vmail.colobocckle.com
72.232.47.2	A+PTR	2.47.232.72.static.reverse.ltdomains.com
72.232.47.52	PTR	k-thx.com
72.232.47.54	PTR	sotf.org
72.232.47.63	A	63.47.232.72.static.reverse.ltdomains.com
72.232.47.77	A	77.47.232.72.static.reverse.ltdomains.com
72.232.47.98	PTR	one.daemonz.net
72.232.47.98	A	mail.natherfamily.com
72.232.47.106	A	artanis.usenet.net.nz
72.232.47.106	A	ns2.timecontinuum.net
72.232.47.146	A	146.47.232.72.static.reverse.ltdomains.com
72.232.47.147	PTR	147.47.232.72.static.reverse.ltdomains.com
72.232.47.166	A+PTR	166.47.232.72.static.reverse.ltdomains.com
72.232.47.170	A	amchamvn.com
72.232.47.171	A	mail.gofeedracer.com
72.232.47.173	PTR	173.47.232.72.static.reverse.ltdomains.com
72.232.47.173	A	mail.crimeindc.org
72.232.47.173	A	crimeindc.org
72.232.47.174	PTR	174.47.232.72.static.reverse.ltdomains.com
72.232.47.174	A	amchamhochiminh.org
72.232.47.174	A	mail.herbcochran.com
72.232.47.194	PTR	194.47.232.72.static.reverse.ltdomains.com
72.232.47.234	A	dclhosting.net
72.232.47.237	A	cervantes.dclhosting.net