Robtex

Up: 212.100.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 212.100.68.0/23
Down right: 212.100.70.0/23

IP	Type	Hostname
212.100.68.1	PTR	eth1.cybaaspace.net
212.100.68.4	PTR	eth4.cybaaspace.net
212.100.68.7	PTR	eth7.cybaaspace.net
212.100.68.9	PTR	eth9.cybaaspace.net
212.100.68.13	PTR	eth13.cybaaspace.net
212.100.68.16	PTR	eth16.cybaaspace.net
212.100.68.17	PTR	eth17.cybaaspace.net
212.100.68.18	PTR	eth18.cybaaspace.net
212.100.68.20	PTR	eth20.cybaaspace.net
212.100.68.22	PTR	eth22.cybaaspace.net
212.100.68.30	PTR	fsdh.cybaaspace.net
212.100.68.141	PTR	visamail.visafone.com.ng
212.100.68.142	PTR	vmail.visafone.com.ng
212.100.69.2	PTR	eth2.jetdisk-ng.com
212.100.69.4	A	infoweb.abs.net
212.100.69.21	PTR	vmail.visafone.com.ng