Robtex

Up: 68.68.20.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 68.68.20.128/26
Down right: 68.68.20.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
68.68.20.128	PTR	educa2.com.br
68.68.20.133	A+PTR	68.68.20.133.customer.bluemilenetworks.com
68.68.20.133	A	www.tritonlimited.com
68.68.20.133	A	tritonlimited.com
68.68.20.135	PTR	email.top-10-web-host.com
68.68.20.141	PTR	68.68.20.141.customer.bluemilenetworks.com
68.68.20.141	A	dasfisch.com
68.68.20.145	PTR	auzs.net
68.68.20.147	PTR	s0ny.tv
68.68.20.152	PTR	email.sk8park.org
68.68.20.159	PTR	shell-arena.net
68.68.20.163	PTR	mail.kirjava.net
68.68.20.165	A+PTR	68.68.20.165.customer.bluemilenetworks.com
68.68.20.166	PTR	mado.madotube.com
68.68.20.167	PTR	vi.winwincreditsolutions.com
68.68.20.167	A	host-71-6-211-157.server.zanadoo.com
68.68.20.167	A	wushu-taichi.com
68.68.20.181	A	ns2.1maxhosting.com
68.68.20.191	PTR	68-68-20-191.reverse.secserverpros.com
68.68.20.191	A	68.68.20.191.customer.bluemilenetworks.com
68.68.20.203	A+PTR	68.68.20.203.customer.bluemilenetworks.com
68.68.20.217	A+PTR	68.68.20.217.customer.bluemilenetworks.com
68.68.20.217	A	headed.camppossibiliteas.org
68.68.20.217	A	vindictive.sisterlove.net
68.68.20.221	A+PTR	68.68.20.221.customer.bluemilenetworks.com
68.68.20.222	A+PTR	68.68.20.222.customer.bluemilenetworks.com
68.68.20.225	PTR	mail.kirjava.net
68.68.20.240	PTR	68.68.20.240.customer.bluemilenetworks.com
68.68.20.242	PTR	blue.web-walrus.com
68.68.20.254	PTR	68.68.20.254.customer.bluemilenetworks.com
68.68.20.255	PTR	68.68.20.255.customer.bluemilenetworks.com