Robtex

Up: 83.123.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 83.123.0.0/18
Down right: 83.123.64.0/18

IP	Type	Hostname
83.123.0.2	PTR	hosting123000002.as8665.net
83.123.5.160	PTR	too.stupid.to.configure.reverse.dns
83.123.10.145	PTR	too.stupid.to.configure.reverse.dns
83.123.19.2	PTR	hosting123019002.as8665.net
83.123.22.126	PTR	too.stupid.to.configure.reverse.dns
83.123.42.123	PTR	too.stupid.to.configure.reverse.dns
83.123.72.113	PTR	too.stupid.to.configure.reverse.dns
83.123.75.95	PTR	too.stupid.to.configure.reverse.dns
83.123.83.61	PTR	too.stupid.to.configure.reverse.dns
83.123.101.158	PTR	too.stupid.to.configure.reverse.dns