Robtex

Up: 197.40.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 197.40.128.0/18
Down right: 197.40.192.0/18

IP	Type	Hostname
197.40.131.172	PTR	host-197.40.131.172.tedata.net
197.40.133.164	PTR	host-197.40.133.164.tedata.net
197.40.137.240	PTR	host-197.40.137.240.tedata.net
197.40.142.142	PTR	host-197.40.142.142.tedata.net
197.40.145.115	PTR	host-197.40.145.115.tedata.net
197.40.148.24	PTR	host-197.40.148.24.tedata.net
197.40.149.199	PTR	host-197.40.149.199.tedata.net
197.40.152.4	PTR	host-197.40.152.4.tedata.net
197.40.152.241	PTR	host-197.40.152.241.tedata.net
197.40.154.166	PTR	host-197.40.154.166.tedata.net
197.40.158.14	PTR	host-197.40.158.14.tedata.net
197.40.165.172	PTR	host-197.40.165.172.tedata.net
197.40.168.138	PTR	host-197.40.168.138.tedata.net
197.40.170.68	PTR	host-197.40.170.68.tedata.net
197.40.172.51	PTR	host-197.40.172.51.tedata.net
197.40.174.47	PTR	host-197.40.174.47.tedata.net
197.40.175.76	PTR	host-197.40.175.76.tedata.net
197.40.178.14	PTR	host-197.40.178.14.tedata.net
197.40.178.85	PTR	host-197.40.178.85.tedata.net
197.40.182.226	PTR	host-197.40.182.226.tedata.net
197.40.183.79	A	microsoft.bounceme.net
197.40.188.176	PTR	host-197.40.188.176.tedata.net
197.40.195.139	PTR	host-197.40.195.139.tedata.net
197.40.197.60	PTR	host-197.40.197.60.tedata.net
197.40.198.69	PTR	host-197.40.198.69.tedata.net
197.40.204.69	PTR	host-197.40.204.69.tedata.net
197.40.209.249	PTR	host-197.40.209.249.tedata.net
197.40.212.119	PTR	host-197.40.212.119.tedata.net
197.40.221.0	PTR	host-197.40.221.0.tedata.net
197.40.229.83	PTR	host-197.40.229.83.tedata.net
197.40.240.188	PTR	host-197.40.240.188.tedata.net
197.40.242.217	PTR	host-197.40.242.217.tedata.net
197.40.243.174	PTR	host-197.40.243.174.tedata.net
197.40.244.153	PTR	host-197.40.244.153.tedata.net
197.40.254.9	PTR	host-197.40.254.9.tedata.net
197.40.254.84	PTR	host-197.40.254.84.tedata.net
197.40.254.244	PTR	host-197.40.254.244.tedata.net
197.40.255.206	PTR	host-197.40.255.206.tedata.net