Robtex

Up: 199.168.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 199.168.12.0/25
Down right: 199.168.12.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.168.12.9	A	ns2.macmillanusa.com
199.168.12.10	A+PTR	mail2.hbpna.com
199.168.12.52	A	courses.bfwpub.com
199.168.12.93	A+PTR	mail.hbpna.com
199.168.12.100	A	picadorusacrime.com
199.168.12.102	A	thenightmareverse.com
199.168.12.102	A	sciampresentingpsychology.com
199.168.12.102	A	mcpgstaff.com
199.168.12.103	A	www.read-it-first.com
199.168.12.103	A	holtzbrinckintranet.com
199.168.12.104	A	ebookclub.tor.com
199.168.12.106	A	legallad.com
199.168.12.107	PTR	us.macmillan.com
199.168.12.107	A	giveaway.tor.com
199.168.12.117	A	macmillan.com
199.168.12.117	A	macmillan.com.cn
199.168.12.119	A	facultylounge.whfreeman.com
199.168.12.125	A	bcs.whfreeman.com
199.168.12.126	A	bcs.bedfordstmartins.com
199.168.12.128	A	bcs.worthpublishers.com
199.168.12.129	A	assessments.bfwpub.com
199.168.12.131	A	www.bfwpub.com
199.168.12.133	A	www.whfreeman.com
199.168.12.134	A	i-clicker.com
199.168.12.134	A	iclicker.com
199.168.12.134	A	www.iclicker.com
199.168.12.135	A	worthpub.com
199.168.12.137	A	yourgeographyportal.com
199.168.12.137	A	www.yourstatsportal.com
199.168.12.137	A	yourstatsportal.com
199.168.12.138	A	www.worthpublishers.com
199.168.12.140	A	psych2go.com
199.168.12.142	A	bedfordresearcher.com
199.168.12.142	A	thelifewire.com
199.168.12.142	A	bfwhighschool.com
199.168.12.148	A	activation.macmillanhighered.com
199.168.12.153	A	bedfordbits.com
199.168.12.153	A	adjunctcentral.com
199.168.12.153	A	theactiveclass.com
199.168.12.172	A	purchase.bfwpub.com
199.168.12.175	A	support.bfwpub.com
199.168.12.214	A	qa-macmillanhighered.com