Robtex

Up: 67.217.66.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 67.217.67.0/25
Down right: 67.217.67.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
67.217.67.129	A	download.citrixonline.com
67.217.67.130	A+PTR	downloadstage.citrixonline.com
67.217.67.141	A	launch.getgo.com
67.217.67.195	A+PTR	ns2.citrixonline.com
67.217.67.195	A+PTR	ns2.expertcity.com
67.217.67.195	A+PTR	ns2.getgo.com
67.217.67.199	A+PTR	dnsstageslave1.iad.expertcity.com
67.217.67.200	A	static.citrixonlinecdn.com
67.217.67.203	A+PTR	ns3.cdn.expertcity.com
67.217.67.203	A	nsiad.getgocdn.com
67.217.67.203	A	ns3.citrixonlinecdn.com
67.217.67.204	A+PTR	iad-img-vip.citrixonline.com
67.217.67.204	A	img.citrixonline.com
67.217.67.204	A	citrixonlinecdn.com
67.217.67.214	A	static.getgocdn.com
67.217.67.245	A	load-optimizer-iad.citrixonline.com
67.217.67.249	A+PTR	nat1-chost-iad.expertcity.com
67.217.67.251	A+PTR	nat3-chost-iad.expertcity.com
67.217.67.252	A+PTR	nat4-chost-iad.expertcity.com
67.217.67.254	A	nat6-chost-iad.expertcity.com