Robtex

Up: 66.6.40.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 66.6.41.0/25
Down right: 66.6.41.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.6.41.21	A	metforminsideeffects966.tumblr.com
66.6.41.21	A	seraphim69.tumblr.com
66.6.41.21	A	perkamperin.tumblr.com
66.6.41.30	A	lynnyarne.net
66.6.41.30	A	aw.tumblr.co
66.6.41.30	A	wearethenewblck.com