Robtex

Up: 66.99.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.99.8.0/23
Down right: 66.99.10.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.99.8.5	PTR	alpha2.cuchicago.edu
66.99.8.8	PTR	rf5.cuchicago.edu
66.99.8.21	PTR	pc-66-99-8-21.cuchicago.edu
66.99.8.35	A	www.lsportal.net
66.99.8.36	A	mail.lsportal.net
66.99.8.40	PTR	pc-66-99-8-40.cuchicago.edu
66.99.8.45	A	luthed.org
66.99.8.45	A	luthed.com
66.99.8.45	A	luthed.net
66.99.8.65	PTR	pc-66-99-8-65.cuchicago.edu
66.99.8.65	A	www2.lea.org
66.99.8.81	PTR	pc-66-99-8-81.cuchicago.edu
66.99.8.90	PTR	pc-66-99-8-90.cuchicago.edu
66.99.8.92	PTR	pc-66-99-8-92.cuchicago.edu
66.99.8.95	PTR	pc-66-99-8-95.cuchicago.edu
66.99.8.97	PTR	pc-66-99-8-97.cuchicago.edu
66.99.8.214	PTR	pc-66-99-8-214.cuchicago.edu
66.99.9.2	PTR	pc-66-99-9-2.cuchicago.edu
66.99.9.5	PTR	pc-66-99-9-5.cuchicago.edu
66.99.9.11	PTR	pc-66-99-9-11.cuchicago.edu
66.99.9.22	PTR	pc-66-99-9-22.cuchicago.edu
66.99.9.32	PTR	pc-66-99-9-32.cuchicago.edu
66.99.9.43	PTR	pc-66-99-9-43.cuchicago.edu
66.99.9.53	PTR	pc-66-99-9-53.cuchicago.edu
66.99.9.196	PTR	pc-66-99-9-196.cuchicago.edu
66.99.9.218	PTR	pc-66-99-9-218.cuchicago.edu
66.99.9.227	PTR	pc-66-99-9-227.cuchicago.edu
66.99.9.254	PTR	pc-66-99-9-254.cuchicago.edu
66.99.10.48	A	afs.cuchicago.edu
66.99.10.53	PTR	pc-66-99-10-53.cuchicago.edu
66.99.10.70	PTR	pc-66-99-10-70.cuchicago.edu
66.99.10.74	A+PTR	caisrh4.cuchicago.edu
66.99.10.75	A+PTR	caisrh5.cuchicago.edu
66.99.10.132	PTR	pc-66-99-10-132.cuchicago.edu
66.99.10.181	A+PTR	mx1.cuchicago.edu
66.99.10.181	A	mx.cuchicago.edu
66.99.10.182	A+PTR	mx2.cuchicago.edu
66.99.10.182	A	mx.cuchicago.edu
66.99.11.0	PTR	pc-66-99-11-0.cuchicago.edu
66.99.11.5	PTR	pc-66-99-11-5.cuchicago.edu
66.99.11.8	PTR	pc-66-99-11-8.cuchicago.edu
66.99.11.12	PTR	www.cuchicago.edu
66.99.11.12	A	cuchicago.info
66.99.11.12	A	cuchicago.edu
66.99.11.18	A+PTR	cas.cuchicago.edu
66.99.11.33	A	messiahchicago.org
66.99.11.33	A	www.messiahchicago.org
66.99.11.42	PTR	pc-66-99-11-42.cuchicago.edu
66.99.11.80	A+PTR	blackboard.cuchicago.edu
66.99.11.83	PTR	pc-66-99-11-83.cuchicago.edu
66.99.11.83	A	webserv.cuchicago.edu
66.99.11.160	PTR	webmail.cuchicago.edu
66.99.11.161	PTR	pc-66-99-11-161.cuchicago.edu
66.99.11.161	A	connect.cuchicago.edu
66.99.11.187	PTR	pc-66-99-11-187.cuchicago.edu
66.99.11.187	A	webmail.cuchicago.edu
66.99.11.195	A+PTR	imap.cuchicago.edu
66.99.11.212	A	stuimap.cuchicago.edu