Robtex

Up: 121.7.48.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 121.7.48.0/22
Down right: 121.7.52.0/22

IP	Type	Hostname
121.7.48.4	A+PTR	bb121-7-48-4.singnet.com.sg
121.7.48.83	PTR	bb121-7-48-83.singnet.com.sg
121.7.48.166	A	bb121-7-48-166.singnet.com.sg
121.7.49.149	A+PTR	bb121-7-49-149.singnet.com.sg
121.7.50.50	A+PTR	bb121-7-50-50.singnet.com.sg
121.7.50.227	A	bb121-7-50-227.singnet.com.sg
121.7.51.3	A+PTR	bb121-7-51-3.singnet.com.sg
121.7.51.24	A+PTR	bb121-7-51-24.singnet.com.sg
121.7.51.40	A	bb121-7-51-40.singnet.com.sg
121.7.51.73	PTR	bb121-7-51-73.singnet.com.sg
121.7.51.87	A	bb121-7-51-87.singnet.com.sg
121.7.51.100	A	bb121-7-51-100.singnet.com.sg
121.7.51.105	A+PTR	bb121-7-51-105.singnet.com.sg
121.7.51.207	A	bb121-7-51-207.singnet.com.sg
121.7.51.222	A	bb121-7-51-222.singnet.com.sg
121.7.52.23	A	bb121-7-52-23.singnet.com.sg
121.7.52.26	A+PTR	bb121-7-52-26.singnet.com.sg
121.7.52.163	A	bb121-7-52-163.singnet.com.sg
121.7.52.249	A+PTR	bb121-7-52-249.singnet.com.sg
121.7.53.23	A	bb121-7-53-23.singnet.com.sg
121.7.53.61	A	bb121-7-53-61.singnet.com.sg
121.7.53.112	A	bb121-7-53-112.singnet.com.sg
121.7.53.200	A+PTR	bb121-7-53-200.singnet.com.sg
121.7.55.15	A	bb121-7-55-15.singnet.com.sg
121.7.55.200	A+PTR	bb121-7-55-200.singnet.com.sg
121.7.55.202	A	bb121-7-55-202.singnet.com.sg