Robtex

Up: 121.7.56.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 121.7.56.0/25
Down right: 121.7.56.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
121.7.56.37	A	bb121-7-56-37.singnet.com.sg
121.7.56.96	A+PTR	bb121-7-56-96.singnet.com.sg
121.7.56.96	A	conwayserver.com
121.7.56.96	A	kbraendli.com
121.7.56.113	A+PTR	bb121-7-56-113.singnet.com.sg
121.7.56.169	A+PTR	bb121-7-56-169.singnet.com.sg
121.7.56.226	PTR	bb121-7-56-226.singnet.com.sg