Robtex

Up: 197.41.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 197.41.232.0/23
Down right: 197.41.234.0/23

IP	Type	Hostname
197.41.233.140	PTR	host-197.41.233.140.tedata.net
197.41.234.14	PTR	host-197.41.234.14.tedata.net
197.41.234.25	PTR	host-197.41.234.25.tedata.net
197.41.234.32	PTR	host-197.41.234.32.tedata.net
197.41.234.45	PTR	host-197.41.234.45.tedata.net
197.41.234.59	PTR	host-197.41.234.59.tedata.net
197.41.234.69	PTR	host-197.41.234.69.tedata.net
197.41.234.79	PTR	host-197.41.234.79.tedata.net
197.41.234.80	PTR	host-197.41.234.80.tedata.net
197.41.234.83	PTR	host-197.41.234.83.tedata.net
197.41.234.90	PTR	host-197.41.234.90.tedata.net
197.41.234.98	PTR	host-197.41.234.98.tedata.net
197.41.234.108	PTR	host-197.41.234.108.tedata.net
197.41.234.125	PTR	host-197.41.234.125.tedata.net
197.41.234.128	PTR	host-197.41.234.128.tedata.net
197.41.234.146	PTR	host-197.41.234.146.tedata.net
197.41.234.150	PTR	host-197.41.234.150.tedata.net
197.41.234.161	PTR	host-197.41.234.161.tedata.net
197.41.234.162	PTR	host-197.41.234.162.tedata.net
197.41.234.171	PTR	host-197.41.234.171.tedata.net
197.41.234.186	PTR	host-197.41.234.186.tedata.net
197.41.234.205	PTR	host-197.41.234.205.tedata.net
197.41.234.210	PTR	host-197.41.234.210.tedata.net
197.41.234.229	PTR	host-197.41.234.229.tedata.net
197.41.234.240	PTR	host-197.41.234.240.tedata.net
197.41.234.244	PTR	host-197.41.234.244.tedata.net
197.41.234.254	PTR	host-197.41.234.254.tedata.net
197.41.235.224	PTR	host-197.41.235.224.tedata.net