Robtex

Up: 216.73.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.73.72.0/23
Down right: 216.73.74.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.73.72.4	A	lrsd-072-004.merlin.mb.ca
216.73.72.5	PTR	lrsd-072-005.merlin.mb.ca
216.73.72.5	A	dns1.lrsd.net
216.73.72.11	A	exchange.lrsd.net
216.73.72.11	A	autodiscover.lrsd.net
216.73.72.15	A+PTR	edge1.lrsd.net
216.73.72.49	PTR	lrsd-072-049.merlin.mb.ca
216.73.72.49	A	denied.lrsd.net
216.73.72.53	A+PTR	www.lrsd.net
216.73.72.53	A	lrsd.net
216.73.72.57	A	apps.lrsd.net
216.73.72.80	PTR	edge1.lrsd.net
216.73.72.80	A	portal.lrsd.net
216.73.72.80	A	library.lrsd.net
216.73.72.90	A+PTR	access.lrsd.net
216.73.72.91	A	webcon.lrsd.net
216.73.72.92	PTR	webcon.lrsd.net
216.73.72.93	PTR	webcon.lrsd.net
216.73.72.93	A	access.lrsd.net
216.73.72.94	A	webcon.lrsd.net
216.73.72.98	A	lsrp.lrsd.net
216.73.72.101	PTR	lrsd-072-101.merlin.mb.ca
216.73.72.109	A+PTR	lrsd-072-109.merlin.mb.ca
216.73.72.110	A	lrsd-072-110.merlin.mb.ca
216.73.72.111	PTR	lrsd-072-111.merlin.mb.ca
216.73.72.112	A+PTR	lrsd-072-112.merlin.mb.ca
216.73.72.122	PTR	lrsd-072-122.merlin.mb.ca
216.73.72.128	PTR	lrsd-072-128.merlin.mb.ca
216.73.72.130	A+PTR	lrsd-072-130.merlin.mb.ca
216.73.72.131	A	lrsd-072-131.merlin.mb.ca
216.73.72.134	A+PTR	lrsd-072-134.merlin.mb.ca
216.73.72.138	A+PTR	lrsd-072-138.merlin.mb.ca
216.73.72.144	A+PTR	lrsd-072-144.merlin.mb.ca
216.73.72.202	A	lrsd-072-202.merlin.mb.ca
216.73.72.203	PTR	lrsd-072-203.merlin.mb.ca
216.73.72.209	A+PTR	lrsd-072-209.merlin.mb.ca
216.73.72.250	A+PTR	lrsd-072-250.merlin.mb.ca
216.73.73.2	A+PTR	mail.cmu.ca
216.73.73.3	PTR	cmu-073-003.merlin.mb.ca
216.73.73.3	A	portal.cmu.ca
216.73.73.7	PTR	cmu-073-007.merlin.mb.ca
216.73.73.7	A	cmu.ca
216.73.73.8	PTR	cmu-073-008.merlin.mb.ca
216.73.73.8	A	com.ezproxy.cmu.ca
216.73.73.8	A	ezproxy.cmu.ca
216.73.73.13	PTR	cmu-073-013.merlin.mb.ca
216.73.73.13	A	facultyportal.cmu.ca
216.73.73.18	A+PTR	cmu-073-018.merlin.mb.ca
216.73.73.37	PTR	vc3.mvsd.ca
216.73.73.107	A	iphost-073-107.merlin.mb.ca
216.73.73.116	PTR	iphost-073-116.merlin.mb.ca
216.73.73.162	A+PTR	esd-073-162.merlin.mb.ca
216.73.73.163	A+PTR	esd-073-163.merlin.mb.ca
216.73.73.163	A	www.esd.mb.ca
216.73.73.163	A	esd.mb.ca
216.73.73.177	PTR	esd-073-177.merlin.mb.ca
216.73.73.177	A	esd.ca
216.73.73.177	A	www.esd.ca
216.73.74.3	A	cslr.dsfm.mb.ca
216.73.74.8	PTR	iphost-074-008.merlin.mb.ca
216.73.74.16	A+PTR	iphost-074-016.merlin.mb.ca
216.73.74.29	A+PTR	iphost-074-029.merlin.mb.ca
216.73.74.37	PTR	iphost-074-037.merlin.mb.ca
216.73.74.49	PTR	iphost-074-049.merlin.mb.ca
216.73.74.50	A+PTR	iphost-074-050.merlin.mb.ca
216.73.74.64	A	pt.dsfm.mb.ca
216.73.74.65	PTR	iphost-074-065.merlin.mb.ca
216.73.74.65	A	dsfm.mb.ca
216.73.74.65	A	www.dsfm.mb.ca
216.73.75.34	PTR	mail2.rrsd.mb.ca
216.73.75.40	A	access.rrsd.mb.ca
216.73.75.98	A+PTR	outbound.westernsd.mb.ca
216.73.75.101	A+PTR	wesd-075-101.merlin.mb.ca
216.73.75.130	PTR	prsd-075-130.merlin.mb.ca
216.73.75.136	PTR	prsd-075-136.merlin.mb.ca
216.73.75.138	A	connect.prsdmb.ca
216.73.75.143	A+PTR	prsd-075-143.merlin.mb.ca
216.73.75.147	A+PTR	prsd-075-147.merlin.mb.ca
216.73.75.155	A+PTR	prsd-075-155.merlin.mb.ca
216.73.75.161	A+PTR	prsd-075-161.merlin.mb.ca
216.73.75.169	A	prsd-075-169.merlin.mb.ca