Robtex

Up: 208.68.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 208.68.48.0/23
Down right: 208.68.50.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.68.48.35	PTR	35-48-68-208.skybeam.com
208.68.48.77	PTR	77-48-68-208.skybeam.com
208.68.48.109	PTR	109-48-68-208.skybeam.com
208.68.48.148	PTR	148-48-68-208.skybeam.com
208.68.48.156	PTR	lhuabs.net
208.68.48.190	PTR	www.t-bug.net
208.68.48.196	PTR	196-48-68-208.skybeam.com
208.68.48.221	A	mail2.schaferveterinary.com
208.68.48.235	PTR	mail.eatonfire.org
208.68.49.64	PTR	64-49-68-208.skybeam.com
208.68.49.142	PTR	142-49-68-208.skybeam.com
208.68.49.146	PTR	146-49-68-208.skybeam.com
208.68.49.196	PTR	196-49-68-208.skybeam.com
208.68.49.205	PTR	205-49-68-208.skybeam.com
208.68.50.5	PTR	5-50-68-208.skybeam.com
208.68.50.70	A+PTR	ns3.skybeam.com
208.68.50.70	A	ns1.pathbroadband.com
208.68.50.71	A	ns4.skybeam.com
208.68.50.72	A+PTR	nco-svr-zbx.skybeam.net
208.68.50.72	A	ftcl001.digis.net
208.68.50.72	A	my.lpbroadband.net
208.68.50.80	PTR	80-50-68-208.skybeam.com
208.68.50.106	PTR	nco-svr-402-stream.skybeam.net
208.68.50.108	A+PTR	webhost.skybeam.com
208.68.50.108	A	skybeam.org
208.68.50.108	A	myxmail.net
208.68.50.109	PTR	ns2.skybeam.net
208.68.50.110	PTR	ns1.skybeam.com
208.68.50.224	PTR	224-50-68-208.skybeam.com
208.68.50.225	A	mail.theflyingschool.com
208.68.51.39	A	fartyshark.com
208.68.51.172	A	loredous.net
208.68.51.172	A	home.loredous.net
208.68.51.215	PTR	215-51-68-208.skybeam.com
208.68.51.215	A	deadduck.net
208.68.51.215	A	www.deadduck.net