Robtex

Up: 72.211.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 72.211.16.0/22
Down right: 72.211.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.211.18.134	PTR	wsip-72-211-18-134.ph.ph.cox.net
72.211.18.145	A+PTR	wsip-72-211-18-145.ph.ph.cox.net
72.211.18.145	A	diregames.com
72.211.18.145	A	macomber.org
72.211.19.198	A	mta001596fc405d.mm.ks.ks.cox.net
72.211.19.228	A+PTR	wsip-72-211-19-228.ph.ph.cox.net
72.211.20.62	A	wsip-72-211-20-62.ph.ph.cox.net
72.211.20.118	A	wsip-72-211-20-118.ph.ph.cox.net
72.211.20.238	A	wsip-72-211-20-238.ph.ph.cox.net
72.211.20.241	A+PTR	wsip-72-211-20-241.ph.ph.cox.net
72.211.21.213	A+PTR	wsip-72-211-21-213.ph.ph.cox.net
72.211.21.213	A	randmsystems.com
72.211.22.51	A	wsip-72-211-22-51.ph.ph.cox.net