Robtex

Up: 221.128.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 221.128.52.0/23
Down right: 221.128.54.0/23

IP	Type	Hostname
221.128.53.35	A+PTR	cable35.dyn53.pacific.net.sg
221.128.53.51	A+PTR	cable51.dyn53.pacific.net.sg
221.128.53.57	A+PTR	cable57.dyn53.pacific.net.sg
221.128.53.59	A+PTR	cable59.dyn53.pacific.net.sg
221.128.53.80	A+PTR	cable80.dyn53.pacific.net.sg
221.128.53.89	A+PTR	cable89.dyn53.pacific.net.sg
221.128.53.108	A+PTR	cable108.dyn53.pacific.net.sg
221.128.53.114	A+PTR	cable114.dyn53.pacific.net.sg
221.128.53.127	A+PTR	cable127.dyn53.pacific.net.sg
221.128.53.134	A+PTR	cable134.dyn53.pacific.net.sg
221.128.53.141	A+PTR	cable141.dyn53.pacific.net.sg
221.128.53.142	A+PTR	cable142.dyn53.pacific.net.sg
221.128.53.150	A+PTR	cable150.dyn53.pacific.net.sg
221.128.53.157	A+PTR	cable157.dyn53.pacific.net.sg
221.128.53.171	A+PTR	cable171.dyn53.pacific.net.sg
221.128.53.177	A+PTR	cable177.dyn53.pacific.net.sg
221.128.53.181	A+PTR	cable181.dyn53.pacific.net.sg
221.128.53.192	A+PTR	cable192.dyn53.pacific.net.sg
221.128.53.205	A+PTR	cable205.dyn53.pacific.net.sg
221.128.53.207	A+PTR	cable207.dyn53.pacific.net.sg
221.128.53.208	A+PTR	cable208.dyn53.pacific.net.sg
221.128.53.221	A+PTR	cable221.dyn53.pacific.net.sg
221.128.53.222	A+PTR	cable222.dyn53.pacific.net.sg
221.128.53.232	A+PTR	cable232.dyn53.pacific.net.sg
221.128.53.238	A+PTR	cable238.dyn53.pacific.net.sg
221.128.53.245	A+PTR	cable245.dyn53.pacific.net.sg