Robtex

Up: 121.6.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 121.6.76.0/23
Down right: 121.6.78.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
121.6.76.8	A+PTR	bb121-6-76-8.singnet.com.sg
121.6.76.8	A	lgfl8.com
121.6.76.44	A+PTR	bb121-6-76-44.singnet.com.sg
121.6.76.44	A	zhonghuawushu.info
121.6.76.44	A	aktio.com.sg
121.6.76.98	A+PTR	bb121-6-76-98.singnet.com.sg
121.6.77.148	A+PTR	bb121-6-77-148.singnet.com.sg
121.6.78.168	A	bb121-6-78-168.singnet.com.sg
121.6.78.218	A+PTR	bb121-6-78-218.singnet.com.sg
121.6.79.23	A+PTR	bb121-6-79-23.singnet.com.sg
121.6.79.25	A	smilelinkdental.com
121.6.79.195	A+PTR	bb121-6-79-195.singnet.com.sg