Robtex

Up: 173.234.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 173.234.16.0/25
Down right: 173.234.16.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.234.16.10	A	byfreeproxy.com
173.234.16.10	A	mail.anonymizer-proxy.com
173.234.16.11	A	mail.proxy-buy.com
173.234.16.11	A	mail.camgigs.com
173.234.16.12	A	mail.bulkproxies.com
173.234.16.12	A	bulkproxies.com
173.234.16.13	PTR	173.234.16.13.rdns.ubiquityservers.com
173.234.16.13	A	ns2.camgigs.com
173.234.16.13	A	ns1.pay-proxy.com
173.234.16.14	A	mail.pay-proxy.com
173.234.16.19	A	vpn.dfw.witopia.net
173.234.16.19	A	vpn.dallas.witopia.net
173.234.16.35	A	vpn.dfw.witopia.net
173.234.16.35	A	vpn.dallas.witopia.net
173.234.16.67	A	vpn.dfw.witopia.net
173.234.16.67	A	vpn.dallas.witopia.net
173.234.16.122	PTR	waraya.critiquelab.com
173.234.16.200	PTR	nhvserver.dayservers.net