Robtex

Up: 117.120.17.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 117.120.17.128/26
Down right: 117.120.17.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
117.120.17.158	PTR	unassigned.messagelabs.net
117.120.17.174	PTR	unassigned.messagelabs.net
117.120.17.175	PTR	unassigned.messagelabs.net
117.120.17.180	PTR	unassigned.messagelabs.net
117.120.17.212	PTR	unassigned.messagelabs.net
117.120.17.225	PTR	unassigned.messagelabs.net
117.120.17.227	PTR	unassigned.messagelabs.net
117.120.17.227	A	proxy69.messagelabs.net
117.120.17.254	PTR	proxy1.sg3.symsaas.net
117.120.17.254	A	proxy2.sg.webscanningservice.com
117.120.17.254	A	roaming1.sg.webscanningservice.com