Robtex

Up: 212.252.48.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 212.252.48.0/22
Down right: 212.252.52.0/22

IP	Type	Hostname
212.252.48.7	PTR	host-212-252-48-7.reverse.superonline.net
212.252.48.7	A	mail.bbstats.superonline.com
212.252.51.35	PTR	host-212-252-51-35.reverse.superonline.net
212.252.51.139	PTR	host-212-252-51-139.reverse.superonline.net
212.252.51.194	PTR	host-212-252-51-194.reverse.superonline.net
212.252.51.203	PTR	host-212-252-51-203.reverse.superonline.net
212.252.51.211	PTR	host-212-252-51-211.reverse.superonline.net