Robtex

Up: 37.72.96.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 37.72.96.0/25
Down right: 37.72.96.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
37.72.96.0	PTR	hosted.by.bitency.net
37.72.96.14	PTR	access11.switch.bitency.net
37.72.96.41	PTR	server.bitency.net
37.72.96.41	A	dwsmedia.be
37.72.96.41	A	mail.dennisopdeweegh.nl
37.72.96.42	PTR	server.bitency.net
37.72.96.42	A	bitency.eu
37.72.96.42	A	www.bitency.nl
37.72.96.50	PTR	hosted.by.bitency.net
37.72.96.52	A	office.bitency.net
37.72.96.67	PTR	hosted.by.bitency.net
37.72.96.100	PTR	hosted.by.bitency.net
37.72.96.100	A	voetbalreport.nl
37.72.96.100	A	zorgservicestwente.nl
37.72.96.101	PTR	hosted.by.bitency.net
37.72.96.101	A	biovitablog.nl
37.72.96.101	A	mail.magnesiumtekort.com
37.72.96.115	PTR	hosted.by.bitency.net
37.72.96.145	A+PTR	ns2.mydnsserver.nl
37.72.96.172	PTR	hosted.by.bitency.net
37.72.96.205	PTR	hosted.by.bitency.net
37.72.96.214	PTR	server04.huizinga.nl
37.72.96.214	A	ns1.huizinga.nl
37.72.96.215	PTR	server05.huizinga.nl
37.72.96.215	A	proeflocaaldivers.nl
37.72.96.215	A	dbabouwadvies.nl
37.72.96.216	A	genomediagnosticsnetherlands.nl
37.72.96.216	A	genomediagnosticsnetherlands.org
37.72.96.216	A	genomediagnosticsnijmegen.nl
37.72.96.221	PTR	spamfilter01.spamloos.nu
37.72.96.221	A	mx01.spamloos.nu
37.72.96.222	A+PTR	out-spamfilter01.spamloos.nu
37.72.96.222	A	mx02.spamloos.nu
37.72.96.225	A+PTR	spamfilter02.spamloos.nu
37.72.96.225	A	mx01.spamloos.nu
37.72.96.226	A+PTR	out-spamfilter02.spamloos.nu
37.72.96.226	A	mx02.spamloos.nu
37.72.96.238	PTR	hosted.by.bitency.net
37.72.96.255	PTR	hosted.by.huizinga.nl