Robtex

Up: 197.33.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 197.33.80.0/22
Down right: 197.33.84.0/22

IP	Type	Hostname
197.33.80.57	PTR	host-197.33.80.57.tedata.net
197.33.80.64	PTR	host-197.33.80.64.tedata.net
197.33.80.66	PTR	host-197.33.80.66.tedata.net
197.33.80.78	PTR	host-197.33.80.78.tedata.net
197.33.80.88	PTR	host-197.33.80.88.tedata.net
197.33.80.132	PTR	host-197.33.80.132.tedata.net
197.33.80.142	PTR	host-197.33.80.142.tedata.net
197.33.80.155	PTR	host-197.33.80.155.tedata.net
197.33.80.191	PTR	host-197.33.80.191.tedata.net
197.33.80.203	PTR	host-197.33.80.203.tedata.net
197.33.80.232	PTR	host-197.33.80.232.tedata.net
197.33.81.16	PTR	host-197.33.81.16.tedata.net
197.33.81.173	PTR	host-197.33.81.173.tedata.net
197.33.82.50	PTR	host-197.33.82.50.tedata.net
197.33.82.58	PTR	host-197.33.82.58.tedata.net
197.33.82.89	PTR	host-197.33.82.89.tedata.net
197.33.82.129	PTR	host-197.33.82.129.tedata.net
197.33.83.70	PTR	host-197.33.83.70.tedata.net
197.33.83.120	PTR	host-197.33.83.120.tedata.net
197.33.83.132	PTR	host-197.33.83.132.tedata.net
197.33.83.153	PTR	host-197.33.83.153.tedata.net
197.33.83.180	PTR	host-197.33.83.180.tedata.net
197.33.83.219	PTR	host-197.33.83.219.tedata.net
197.33.84.114	PTR	host-197.33.84.114.tedata.net
197.33.84.167	PTR	host-197.33.84.167.tedata.net
197.33.85.6	PTR	host-197.33.85.6.tedata.net
197.33.85.94	PTR	host-197.33.85.94.tedata.net
197.33.85.117	PTR	host-197.33.85.117.tedata.net
197.33.85.142	PTR	host-197.33.85.142.tedata.net
197.33.85.148	PTR	host-197.33.85.148.tedata.net
197.33.85.204	PTR	host-197.33.85.204.tedata.net
197.33.86.66	PTR	host-197.33.86.66.tedata.net
197.33.86.121	PTR	host-197.33.86.121.tedata.net
197.33.86.128	PTR	host-197.33.86.128.tedata.net
197.33.86.139	PTR	host-197.33.86.139.tedata.net
197.33.86.254	PTR	host-197.33.86.254.tedata.net
197.33.87.61	PTR	host-197.33.87.61.tedata.net
197.33.87.112	PTR	host-197.33.87.112.tedata.net
197.33.87.154	PTR	host-197.33.87.154.tedata.net