Robtex

Up: 100.28.0.0/14
Can't show all results, try to descend to a more specific CIDR
Down left: 100.28.0.0/16
Down right: 100.29.0.0/16
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
100.28.100.10	A+PTR	ec2-100-28-100-10.compute-1.amazonaws.com
100.29.53.101	A+PTR	ec2-100-29-53-101.compute-1.amazonaws.com
100.29.150.17	A+PTR	ec2-100-29-150-17.compute-1.amazonaws.com
100.29.150.17	A	oitbg.com
100.29.150.17	A	diurrpjc.net