Robtex

Up: 166.233.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 166.233.32.0/20
Down right: 166.233.48.0/20

IP	Type	Hostname
166.233.32.0	A+PTR	0.32.233.166.in-addr.arpa
166.233.32.2	A+PTR	2.32.233.166.in-addr.arpa
166.233.33.0	A+PTR	0.33.233.166.in-addr.arpa
166.233.34.0	PTR	0.34.233.166.in-addr.arpa
166.233.35.0	A+PTR	0.35.233.166.in-addr.arpa
166.233.36.0	A+PTR	0.36.233.166.in-addr.arpa
166.233.37.0	A+PTR	0.37.233.166.in-addr.arpa
166.233.38.0	PTR	0.38.233.166.in-addr.arpa
166.233.39.0	PTR	0.39.233.166.in-addr.arpa
166.233.40.0	PTR	0.40.233.166.in-addr.arpa
166.233.41.0	A+PTR	0.41.233.166.in-addr.arpa
166.233.41.116	PTR	166.233.41.116
166.233.43.0	PTR	0.43.233.166.in-addr.arpa
166.233.44.0	PTR	0.44.233.166.in-addr.arpa
166.233.45.0	A+PTR	0.45.233.166.in-addr.arpa
166.233.46.0	A+PTR	0.46.233.166.in-addr.arpa
166.233.47.0	A+PTR	0.47.233.166.in-addr.arpa
166.233.48.0	A+PTR	0.48.233.166.in-addr.arpa
166.233.49.0	PTR	0.49.233.166.in-addr.arpa
166.233.50.0	A+PTR	0.50.233.166.in-addr.arpa
166.233.51.0	PTR	0.51.233.166.in-addr.arpa
166.233.52.0	PTR	0.52.233.166.in-addr.arpa
166.233.53.0	A+PTR	0.53.233.166.in-addr.arpa
166.233.54.0	A+PTR	0.54.233.166.in-addr.arpa
166.233.55.0	A+PTR	0.55.233.166.in-addr.arpa
166.233.56.0	A+PTR	0.56.233.166.in-addr.arpa
166.233.57.0	PTR	0.57.233.166.in-addr.arpa
166.233.58.0	A+PTR	0.58.233.166.in-addr.arpa
166.233.59.0	PTR	0.59.233.166.in-addr.arpa
166.233.60.0	PTR	0.60.233.166.in-addr.arpa
166.233.61.0	A+PTR	0.61.233.166.in-addr.arpa
166.233.62.0	A+PTR	0.62.233.166.in-addr.arpa
166.233.63.0	A+PTR	0.63.233.166.in-addr.arpa