Robtex

Up: 197.40.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 197.40.32.0/20
Down right: 197.40.48.0/20

IP	Type	Hostname
197.40.34.72	PTR	host-197.40.34.72.tedata.net
197.40.35.139	PTR	host-197.40.35.139.tedata.net
197.40.37.23	PTR	host-197.40.37.23.tedata.net
197.40.38.2	PTR	host-197.40.38.2.tedata.net
197.40.38.179	PTR	host-197.40.38.179.tedata.net
197.40.42.164	PTR	host-197.40.42.164.tedata.net
197.40.42.234	PTR	host-197.40.42.234.tedata.net
197.40.43.7	PTR	host-197.40.43.7.tedata.net
197.40.43.16	PTR	host-197.40.43.16.tedata.net
197.40.43.74	PTR	host-197.40.43.74.tedata.net
197.40.44.36	PTR	host-197.40.44.36.tedata.net
197.40.47.188	PTR	host-197.40.47.188.tedata.net
197.40.48.104	PTR	host-197.40.48.104.tedata.net
197.40.50.65	PTR	host-197.40.50.65.tedata.net
197.40.50.224	PTR	host-197.40.50.224.tedata.net
197.40.51.80	PTR	host-197.40.51.80.tedata.net
197.40.53.198	PTR	host-197.40.53.198.tedata.net
197.40.56.249	PTR	host-197.40.56.249.tedata.net
197.40.57.79	PTR	host-197.40.57.79.tedata.net
197.40.57.120	PTR	host-197.40.57.120.tedata.net
197.40.57.137	PTR	host-197.40.57.137.tedata.net
197.40.57.194	PTR	host-197.40.57.194.tedata.net
197.40.59.222	PTR	host-197.40.59.222.tedata.net
197.40.62.137	PTR	host-197.40.62.137.tedata.net