Robtex

Up: 74.120.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 74.120.72.0/23
Down right: 74.120.74.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
74.120.72.10	A+PTR	sdhuns1.sdhu.com
74.120.72.11	A+PTR	sdhuns2.sdhu.com
74.120.72.15	A+PTR	mail1.sdhu.com
74.120.72.15	A	mail1.phsd.ca
74.120.72.16	A+PTR	mail2.sdhu.com
74.120.72.16	A	mail2.phsd.ca
74.120.72.20	A+PTR	sdhu.com
74.120.72.20	A+PTR	www.sdhu.com
74.120.72.20	A	www.phsd.ca