Robtex

Up: 100.42.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 100.42.0.0/22
Down right: 100.42.4.0/22

IP	Type	Hostname
100.42.0.0	PTR	isosat.net
100.42.0.57	A	mail.gocsg.net
100.42.0.57	A	earth.isosat.net
100.42.0.58	PTR	isosat.net
100.42.0.58	PTR	www.isosat.net
100.42.0.60	PTR	remote.isosat.net
100.42.0.60	A	mail.isosat.net
100.42.0.61	PTR	dns2.isosat.net
100.42.0.61	A	ns2.isosat.net