Robtex

Up: 69.16.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 69.16.76.0/23
Down right: 69.16.78.0/23

IP	Type	Hostname
69.16.76.129	A	dev.umassonline.net
69.16.76.136	A	forth.umassp.edu
69.16.76.145	A	tst90-collab.umassonline.net
69.16.77.85	A+PTR	email2.umassp.edu
69.16.78.12	PTR	its-69-16-78-12.umasscs.net
69.16.78.72	A+PTR	bosvcsns01.umasscs.net
69.16.78.84	PTR	its-69-16-78-84.umasscs.net
69.16.78.84	A	amsvcsns02.umasscs.net
69.16.78.124	PTR	its-69-16-78-124.umasscs.net
69.16.78.156	PTR	its-69-16-78-156.umasscs.net
69.16.78.179	A+PTR	sm-tst90.hcm.umasscs.net