Robtex

Up: 208.83.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 208.83.100.0/23
Down right: 208.83.102.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.83.100.0	A+PTR	net-208-83-100.actusa.net
208.83.100.15	A+PTR	dal-watch.actusa.net
208.83.100.16	A	dal-reports.actusa.net
208.83.100.26	A+PTR	dns2.actusa.net
208.83.100.27	A	vclug.net
208.83.100.41	A	ipv6info.org
208.83.100.41	A	ipv6-info.org
208.83.100.41	A	www.ipv6info.org
208.83.100.89	A	cvarc.org
208.83.100.243	A	fwg-1.actusa.net
208.83.101.172	A	opensourceconferences.org
208.83.101.226	A+PTR	mail.linuxfests.org
208.83.101.226	A	mail.socallinuxexpo.com
208.83.101.226	A	mail.socallinuxexpo.org
208.83.101.230	A	www.socallinuxexpo.com
208.83.101.230	A	southerncalifornialinuxexpo.com
208.83.101.230	A	www.socallinuxexpo.org
208.83.101.234	A	voip-scale.actusa.net
208.83.101.234	A	maggie.socallinuxexpo.org
208.83.101.235	PTR	documents.linuxfests.org
208.83.101.235	A	wifoss.net