Robtex

Up: 197.52.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 197.52.128.0/18
Down right: 197.52.192.0/18

IP	Type	Hostname
197.52.128.239	PTR	host-197.52.128.239.tedata.net
197.52.138.136	PTR	host-197.52.138.136.tedata.net
197.52.139.100	PTR	host-197.52.139.100.tedata.net
197.52.145.175	PTR	host-197.52.145.175.tedata.net
197.52.153.182	PTR	host-197.52.153.182.tedata.net
197.52.162.139	PTR	host-197.52.162.139.tedata.net
197.52.163.70	PTR	host-197.52.163.70.tedata.net
197.52.166.79	PTR	host-197.52.166.79.tedata.net
197.52.167.255	PTR	host-197.52.167.255.tedata.net
197.52.170.201	PTR	host-197.52.170.201.tedata.net
197.52.171.93	PTR	host-197.52.171.93.tedata.net
197.52.176.35	PTR	host-197.52.176.35.tedata.net
197.52.178.212	PTR	host-197.52.178.212.tedata.net
197.52.179.26	PTR	host-197.52.179.26.tedata.net
197.52.180.211	PTR	host-197.52.180.211.tedata.net
197.52.186.252	PTR	host-197.52.186.252.tedata.net
197.52.214.230	PTR	host-197.52.214.230.tedata.net
197.52.220.213	PTR	host-197.52.220.213.tedata.net
197.52.222.161	PTR	host-197.52.222.161.tedata.net
197.52.228.201	PTR	host-197.52.228.201.tedata.net
197.52.245.121	PTR	host-197.52.245.121.tedata.net
197.52.246.152	PTR	host-197.52.246.152.tedata.net
197.52.252.102	PTR	host-197.52.252.102.tedata.net
197.52.253.255	PTR	host-197.52.253.255.tedata.net