Robtex

Up: 212.252.92.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.252.92.0/25
Down right: 212.252.92.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.252.92.0	PTR	host-212-252-92-0.reverse.superonline.net
212.252.92.82	PTR	webmail.iberkom.com
212.252.92.82	PTR	mail.iberkom.com
212.252.92.82	A+PTR	webmail.mobi-net.com.tr
212.252.92.186	PTR	host-212-252-92-186.reverse.superonline.net