Robtex

Up: 72.52.15.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 72.52.15.0/26
Down right: 72.52.15.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.52.15.1	PTR	unknown.prolexic.com
72.52.15.10	PTR	unknown.prolexic.com
72.52.15.18	PTR	a72-52-15-18.deploy.static.akamaitechnologies.com
72.52.15.18	A	shadowserver.org
72.52.15.18	A	www.shadowserver.org
72.52.15.21	PTR	unknown.prolexic.com
72.52.15.21	A	www.exxonmobilpipeline.com
72.52.15.21	A	empccontractortraining.com
72.52.15.22	PTR	unknown.prolexic.com
72.52.15.24	PTR	unknown.prolexic.com
72.52.15.29	PTR	unknown.prolexic.com
72.52.15.29	A	www.hse24.at
72.52.15.30	PTR	unknown.prolexic.com
72.52.15.30	A	shoppinglive.ru
72.52.15.31	PTR	unknown.prolexic.com
72.52.15.31	A	static.hse24-dach.net
72.52.15.41	PTR	unknown.prolexic.com
72.52.15.41	A	store.ibo.org
72.52.15.42	PTR	unknown.prolexic.com
72.52.15.42	A	webcasts-barclays-com-vip.dms.barclays.com
72.52.15.52	PTR	unknown.prolexic.com
72.52.15.58	PTR	unknown.prolexic.com
72.52.15.63	PTR	unknown.prolexic.com
72.52.15.67	PTR	a72-52-15-67.deploy.static.akamaitechnologies.com
72.52.15.67	A	contact.ubp.com
72.52.15.68	PTR	unknown.prolexic.com
72.52.15.68	A	www.ubgi.fr
72.52.15.69	PTR	unknown.prolexic.com
72.52.15.79	A	adobe-dns.www.plimus.com
72.52.15.79	A	com2fhttp3awww.www.plimus.com
72.52.15.79	A	97.html.www.plimus.com
72.52.15.81	PTR	unknown.prolexic.com
72.52.15.88	PTR	unknown.prolexic.com
72.52.15.92	A	www4.optionsxpress.com
72.52.15.105	PTR	a72-52-15-105.deploy.static.akamaitechnologies.com
72.52.15.105	A	www.merlin.pl
72.52.15.105	A	merlinmuzyka.pl
72.52.15.106	PTR	unknown.prolexic.com