Robtex

Up: 72.9.192.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.9.192.0/23
Down right: 72.9.194.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.9.192.0	A+PTR	0.192.9.72.static.ip.tnltd.net
72.9.192.32	A+PTR	32.192.9.72.static.ip.tnltd.net
72.9.192.197	A	ns.spring2.com
72.9.192.218	A	bigtime.spring2.com
72.9.193.0	A+PTR	0.193.9.72.static.ip.tnltd.net
72.9.193.73	A+PTR	73.193.9.72.static.ip.tnltd.net
72.9.193.73	A	myvoice.telesphere.com
72.9.193.73	A	bw-ws-01.kslc1.s.vonageservices.com
72.9.193.74	A	vm2.telesphere.com
72.9.193.75	PTR	75.193.9.72.static.ip.tnltd.net
72.9.193.77	A	bw-ums-01.kslc1.s.vonageservices.com
72.9.193.100	PTR	100.193.9.72.static.ip.tnltd.net
72.9.193.109	PTR	109.193.9.72.static.ip.tnltd.net
72.9.193.109	A	myvoice-1b.v.vonageservices.com
72.9.193.109	A	dms-mc.v.vonageservices.com
72.9.193.142	PTR	142.193.9.72.static.ip.tnltd.net
72.9.193.142	A	mail.closetomyheart.com
72.9.193.142	A	mail.studioj.com
72.9.193.181	A	orders.closetomyheart.com
72.9.193.183	PTR	183.193.9.72.static.ip.tnltd.net
72.9.193.183	A	shopctmh.co.nz
72.9.193.184	A+PTR	184.193.9.72.static.ip.tnltd.net
72.9.193.184	A	www.closetomyheart.com
72.9.193.185	A	closetomyheart.com.au
72.9.193.186	A+PTR	186.193.9.72.static.ip.tnltd.net
72.9.193.187	PTR	187.193.9.72.static.ip.tnltd.net
72.9.194.0	A+PTR	0.194.9.72.static.ip.tnltd.net
72.9.194.5	A+PTR	5.194.9.72.static.ip.tnltd.net
72.9.194.15	A+PTR	15.194.9.72.static.ip.tnltd.net
72.9.194.205	PTR	205.194.9.72.static.ip.tnltd.net
72.9.194.205	A	iisserver.komatsueq.com
72.9.194.205	A	ns2.komatsueq.com
72.9.194.206	PTR	206.194.9.72.static.ip.tnltd.net
72.9.194.211	PTR	kecmscrm.komatsueq.com
72.9.194.237	A+PTR	237.194.9.72.static.ip.tnltd.net
72.9.194.246	A+PTR	246.194.9.72.static.ip.tnltd.net
72.9.195.0	A+PTR	0.195.9.72.static.ip.tnltd.net
72.9.195.98	PTR	98.195.9.72.static.ip.tnltd.net
72.9.195.104	PTR	mail.nicholasandco.com