Robtex

Up: 166.232.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 166.232.128.0/20
Down right: 166.232.144.0/20

IP	Type	Hostname
166.232.128.0	A+PTR	0.128.232.166.in-addr.arpa
166.232.128.1	A+PTR	1.128.232.166.in-addr.arpa
166.232.129.0	A+PTR	0.129.232.166.in-addr.arpa
166.232.130.0	PTR	0.130.232.166.in-addr.arpa
166.232.131.0	A+PTR	0.131.232.166.in-addr.arpa
166.232.132.0	A+PTR	0.132.232.166.in-addr.arpa
166.232.133.0	PTR	csn-166-232-133-0.uscc.net
166.232.133.0	A	0.133.232.166.in-addr.arpa
166.232.134.0	PTR	0.134.232.166.in-addr.arpa
166.232.135.0	PTR	0.135.232.166.in-addr.arpa
166.232.136.0	A+PTR	0.136.232.166.in-addr.arpa
166.232.137.0	A+PTR	0.137.232.166.in-addr.arpa
166.232.138.0	PTR	0.138.232.166.in-addr.arpa
166.232.139.0	PTR	0.139.232.166.in-addr.arpa
166.232.140.0	A+PTR	0.140.232.166.in-addr.arpa
166.232.141.0	A+PTR	0.141.232.166.in-addr.arpa
166.232.142.0	PTR	0.142.232.166.in-addr.arpa
166.232.143.0	PTR	0.143.232.166.in-addr.arpa
166.232.144.0	PTR	0.144.232.166.in-addr.arpa
166.232.145.0	PTR	0.145.232.166.in-addr.arpa
166.232.146.0	A+PTR	0.146.232.166.in-addr.arpa
166.232.147.0	PTR	0.147.232.166.in-addr.arpa
166.232.148.0	A+PTR	0.148.232.166.in-addr.arpa
166.232.149.0	A+PTR	0.149.232.166.in-addr.arpa
166.232.150.0	A+PTR	0.150.232.166.in-addr.arpa
166.232.151.0	A+PTR	0.151.232.166.in-addr.arpa
166.232.152.0	PTR	csn-166-232-152-0.uscc.net
166.232.152.118	PTR	166.232.152.118
166.232.152.215	PTR	csn-166-232-152-215.uscc.net
166.232.153.0	A+PTR	0.153.232.166.in-addr.arpa
166.232.153.222	PTR	222.153.232.166.in-addr.arpa
166.232.154.0	PTR	0.154.232.166.in-addr.arpa
166.232.155.0	PTR	0.155.232.166.in-addr.arpa
166.232.156.0	A+PTR	0.156.232.166.in-addr.arpa
166.232.157.0	PTR	0.157.232.166.in-addr.arpa
166.232.158.0	A+PTR	0.158.232.166.in-addr.arpa
166.232.159.0	A+PTR	0.159.232.166.in-addr.arpa