Robtex

Up: 221.128.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 221.128.4.0/23
Down right: 221.128.6.0/23

IP	Type	Hostname
221.128.4.63	A+PTR	cable63.dyn4.pacific.net.sg
221.128.4.66	A+PTR	cable66.dyn4.pacific.net.sg
221.128.4.95	A+PTR	cable95.dyn4.pacific.net.sg
221.128.4.104	A+PTR	cable104.dyn4.pacific.net.sg
221.128.4.140	A+PTR	cable140.dyn4.pacific.net.sg
221.128.4.152	A+PTR	cable152.dyn4.pacific.net.sg
221.128.4.158	A+PTR	cable158.dyn4.pacific.net.sg
221.128.4.182	A+PTR	cable182.dyn4.pacific.net.sg
221.128.4.197	A+PTR	cable197.dyn4.pacific.net.sg
221.128.4.245	A+PTR	cable245.dyn4.pacific.net.sg