Robtex

Up: 203.116.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 203.116.16.0/25
Down right: 203.116.16.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.116.16.157	A	wwwsg.portnet.com
203.116.16.158	A	psa-institute.com
203.116.16.158	A	png1dns1.portnet.com
203.116.16.158	A	pntestbox.com
203.116.16.161	A	m.citos.sg
203.116.16.165	A	png1mail1.portnet.com
203.116.16.193	A+PTR	psa1mail1.psa.com.sg
203.116.16.193	A	portnethub2.portnet.com
203.116.16.202	A	webmail.psa.com.sg