Robtex

Up: 203.120.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 203.120.16.0/22
Down right: 203.120.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.120.16.83	PTR	sg203.120.16-83.globalsources.com
203.120.16.131	PTR	sg203.120.16-131.globalsources.com
203.120.16.137	PTR	sg203.120.16-137.globalsources.com
203.120.16.147	PTR	sg203.120.16-147.globalsources.com
203.120.16.191	A	singaporeproducts.com
203.120.16.191	A	japanproducts.com
203.120.16.192	PTR	sg203.120.16-192.globalsources.com
203.120.16.220	A	www.6xue.info
203.120.16.220	A	6xue.info
203.120.16.251	PTR	sg203.120.16-251.globalsources.com
203.120.17.69	PTR	ocbcomail.ocbc.com
203.120.17.70	PTR	ocbcomail1.ocbc.com
203.120.17.72	PTR	findns.finatiq.com
203.120.17.99	PTR	eurocoptersea.com.sg
203.120.17.104	A	www.eurocoptersea.com.sg
203.120.17.128	PTR	sgnet-203-120-17-128.pacificinternet.com
203.120.17.163	PTR	sgnet-203-120-17-163.pacificinternet.com
203.120.17.164	PTR	mx01.nittan.com.sg
203.120.17.180	PTR	sgnet-203-120-17-180.pacificinternet.com
203.120.17.194	PTR	webmail.mec.com.sg
203.120.17.200	PTR	host200.mec.com.sg
203.120.17.234	PTR	sgnet-203-120-17-234.pacificinternet.com
203.120.17.243	PTR	sgnet-203-120-17-243.pacificinternet.com
203.120.18.46	A	smtp.cnndailyreports.com
203.120.18.98	PTR	ymsatria.mendaki.org.sg
203.120.19.89	PTR	mail2.opulent-group.com
203.120.19.89	A	mxgate01.opulent.com.cn
203.120.19.116	PTR	mx11.smit.com
203.120.19.132	PTR	mail.cordlife.com
203.120.19.132	A	mail.cordlife.com.hk
203.120.19.134	A	ns1.cordlife.com
203.120.19.134	A	pridns.cordlife.com
203.120.19.135	A+PTR	mail.cordlife.com
203.120.19.140	PTR	mail.cordlifeindia.com
203.120.19.147	A	www.cordlife.com
203.120.19.147	A	cordlife.com.hk
203.120.19.147	A	www.cordlife.ph
203.120.19.162	PTR	203-120-19-162.revdns.pacificinternet.com
203.120.20.177	PTR	server.fabnkhoo.sg
203.120.20.178	PTR	server.fabnkhoo.sg
203.120.20.206	PTR	mail.mfglobal.com.sg
203.120.20.228	PTR	mail.hrnet-consulting.com
203.120.20.228	PTR	mail.hrnetone.com
203.120.20.228	PTR	mail.pplefirst.com
203.120.21.8	PTR	merz.jtc.gov.sg
203.120.21.10	PTR	benz.jtc.gov.sg
203.120.21.18	PTR	jtcmba1.jtc.gov.sg
203.120.21.59	A	sgjtheg01.jtci.com.sg
203.120.21.59	A	jtci.com.sg