Robtex

Up: 197.55.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 197.55.16.0/21
Down right: 197.55.24.0/21

IP	Type	Hostname
197.55.17.163	PTR	host-197.55.17.163.tedata.net
197.55.19.35	PTR	host-197.55.19.35.tedata.net
197.55.20.19	PTR	host-197.55.20.19.tedata.net
197.55.20.194	PTR	host-197.55.20.194.tedata.net
197.55.21.80	PTR	host-197.55.21.80.tedata.net
197.55.21.179	PTR	host-197.55.21.179.tedata.net
197.55.23.240	PTR	host-197.55.23.240.tedata.net
197.55.24.225	PTR	host-197.55.24.225.tedata.net