Robtex

Up: 117.120.16.128/25
Can't show all results, try to descend to a more specific CIDR
Down left: 117.120.16.128/27
Down right: 117.120.16.160/27
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
117.120.16.131	A+PTR	proxy4.messagelabs.net
117.120.16.132	A+PTR	proxy33.messagelabs.net
117.120.16.132	A	gazzenger.duckdns.org
117.120.16.133	A+PTR	proxy40.messagelabs.net
117.120.16.134	A+PTR	proxy41.messagelabs.net
117.120.16.135	PTR	unassigned.messagelabs.net
117.120.16.135	A	proxy2.ap.webscanningservice.com
117.120.16.135	A	proxy1.ap.webscanningservice.com
117.120.16.138	A+PTR	proxy58.messagelabs.net
117.120.16.139	A+PTR	proxy63.messagelabs.net
117.120.16.142	PTR	h.v2001.sy.messagelabs.net
117.120.16.147	PTR	unassigned.messagelabs.net
117.120.16.147	A	cluster2out.ap.messagelabs.com
117.120.16.147	A	cluster2.dyxnet.com
117.120.16.149	PTR	unassigned.messagelabs.net
117.120.16.161	PTR	unassigned.messagelabs.net
117.120.16.163	A	mail2.contact-energy.co.nz
117.120.16.165	PTR	proxy40.messagelabs.net
117.120.16.178	PTR	unassigned.messagelabs.net
117.120.16.179	PTR	unassigned.messagelabs.net