Robtex

Up: 204.168.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 204.168.128.0/18
Down right: 204.168.192.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.168.144.6	A+PTR	nypl.iii.com
204.168.144.6	A	ilsstaff.nypl.org
204.168.144.7	A+PTR	nypl-web.iii.com
204.168.144.7	A	catalog.nypl.org
204.168.144.21	PTR	vtls-ocls-app.iii.com
204.168.144.130	A	lvls.iii.com
204.168.144.130	A	0-www.powerlibrary.net.webpac.lvlspa.org
204.168.144.130	A	0-libraries.mangolanguages.com.webpac.lvlspa.org
204.168.144.151	PTR	mhud.iii.com
204.168.144.154	PTR	johnc.iii.com
204.168.144.164	PTR	pasco.iii.com
204.168.156.150	A	compassinvestments.com
204.168.158.128	PTR	128.staffordnet.com
204.168.158.130	PTR	130.staffordnet.com
204.168.248.49	A	xxxxxxxxbri-tcms-vlan-500-2nd.monroe.edu
204.168.248.130	A+PTR	e-iron-admin.monroe.edu
204.168.248.131	A+PTR	ei-as400.monroe.edu
204.168.248.135	A	unknown-204-168-252-135.monroe.edu
204.168.250.1	PTR	xxxxxxxxwc-hs-3750-3rd.monroe.edu
204.168.250.129	A+PTR	webster-do-cisco-e0.monroe.edu
204.168.253.20	A	webster.monroe.edu