Robtex

Up: 212.252.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 212.252.88.0/22
Down right: 212.252.92.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.252.88.0	PTR	host-212-252-88-0.reverse.superonline.net
212.252.90.35	A	ybs.com.tr
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
212.252.95.255	PTR	host-212-252-95-255.reverse.superonline.net