Robtex

Up: 18.68.8.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 18.68.8.0/25
Down right: 18.68.8.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
18.68.8.19	PTR	seq.csbi.mit.edu
18.68.8.19	A	andynu.net
18.68.8.19	A	andynu.org
18.68.8.27	A+PTR	dasan.csbi.mit.edu
18.68.8.35	A	fraenkel.csbi.mit.edu
18.68.8.35	A	fraenkel.mit.edu
18.68.8.48	A+PTR	csbi.mit.edu
18.68.8.48	A	www.csbi.mit.edu
18.68.8.48	A	dns1.csbi.mit.edu
18.68.8.62	A+PTR	biosiladmin.csbi.mit.edu
18.68.8.62	A	dns2.csbi.mit.edu
18.68.8.67	PTR	fraenkel-node8-ilo.csbi.mit.edu
18.68.8.95	A	fraenkel-nsf.csbi.mit.edu