Robtex

Up: 152.163.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 152.163.4.0/25
Down right: 152.163.4.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
152.163.4.37	A	mailsvc.aol.com
152.163.4.79	PTR	prodwebmail-wmail-mr5-c.evip.aol.com
152.163.4.79	A	webmail.aol.com.br
152.163.4.79	A	mail.aol.com.aol.akadns.net
152.163.4.80	A+PTR	webmail-staging-wmail-mr5-c.evip.aol.com
152.163.4.80	A	webmail1.webmail.aol.com
152.163.4.85	A+PTR	webmailcal-mr5-c.evip.aol.com
152.163.4.85	A	webmailcal.egslb.aol.com
152.163.4.175	A+PTR	prodwebmail-wmail-mr5-b.evip.aol.com
152.163.4.175	A	webmail.aol.com.br
152.163.4.175	A	mail.aol.com.aol.akadns.net
152.163.4.176	PTR	webmail-staging-wmail-mr5-b.evip.aol.com
152.163.4.176	A	webmail1.webmail.aol.com
152.163.4.181	A+PTR	webmailcal-mr5-b.evip.aol.com
152.163.4.181	A	webmailcal.egslb.aol.com