Robtex

Up: 173.245.240.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 173.245.240.0/25
Down right: 173.245.240.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.245.240.49	A+PTR	ns.surfairwireless.net
173.245.240.49	A	ns1.surfairwireless.net
173.245.240.49	A	ns.airbaud.net
173.245.240.50	A+PTR	ns2.surfairwireless.net
173.245.240.50	A	ns2.csinet.net
173.245.240.50	A	ns2.airbaud.net