Robtex

Up: 64.95.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 64.95.21.0/25
Down right: 64.95.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.95.21.12	A+PTR	dds1.itginc.com
64.95.21.13	A+PTR	ns1.itginc.com
64.95.21.16	A+PTR	rnproxy1.itginc.com
64.95.21.16	A	rnproxy.itginc.com
64.95.21.18	A	www.itginc.com
64.95.21.18	A	www.dyn.itg.com
64.95.21.18	A	www.block-alert.biz
64.95.21.22	A+PTR	mailgw1.itginc.com
64.95.21.23	A	tca.itginc.com
64.95.21.33	A+PTR	itg.com
64.95.21.33	A+PTR	radical.itginc.com
64.95.21.33	A+PTR	microsites.ny.itginc.com
64.95.21.44	A	connect.dyn.itg.com
64.95.21.44	A	connect.itg.com
64.95.21.46	PTR	itglink.ny.itginc.com
64.95.21.46	A	itglink.dyn.itginc.com
64.95.21.57	A	liquiditymetrics.itg.com
64.95.21.57	A	liquiditymetrics.dyn.itginc.com
64.95.21.70	A+PTR	socks1.itginc.com
64.95.21.77	A+PTR	mailgw5.itginc.com
64.95.21.81	A+PTR	ftpproxy1.itginc.com
64.95.21.101	A	ftp.dyn.itginc.com
64.95.21.110	A+PTR	inet-ns01.ny.itginc.com
64.95.21.110	A	ns2.itginc.com
64.95.21.113	A+PTR	stmbeta.ny.itginc.com
64.95.21.113	A+PTR	alert.ny.itg.com
64.95.21.126	A+PTR	mailgw4.itg.com