Robtex

Up: 83.120.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 83.120.128.0/18
Down right: 83.120.192.0/18

IP	Type	Hostname
83.120.143.75	PTR	too.stupid.to.configure.reverse.dns
83.120.144.20	A	mail.bueroservice-deutschland.de
83.120.152.12	PTR	too.stupid.to.configure.reverse.dns
83.120.217.62	PTR	too.stupid.to.configure.reverse.dns