Robtex

Up: 173.243.38.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 173.243.39.0/25
Down right: 173.243.39.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.243.39.59	A+PTR	smtpfilter-1.purepages.ca
173.243.39.86	A	remote.balancedit.com
173.243.39.140	A	wizardcards.com
173.243.39.140	A	dns4.wizardcards.com
173.243.39.140	A	dns1.wizardcards.com
173.243.39.162	A+PTR	mail.thecjn.ca