Robtex

Up: 104.219.168.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 104.219.172.0/23
Down right: 104.219.174.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
104.219.172.11	A+PTR	mirror.hostduplex.com
104.219.172.13	A	eventregistrationguide.com
104.219.172.13	A	socialcoup.com
104.219.172.13	A	tojuli.us
104.219.173.11	A	secure.hostduplex.com
104.219.173.12	A	support.hostduplex.com