Robtex

Up: 203.81.36.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 203.81.36.0/24
Down right: 203.81.37.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.81.36.0	PTR	203-81-36-0.revdns.pacificinternet.com
203.81.36.2	PTR	vl18.scipk006.pacific.net.sg
203.81.36.5	PTR	vl18.scipk005.pacific.net.sg
203.81.36.10	A	vmw1-gsw.pacnet.net
203.81.36.11	A+PTR	vmw2-gsw.pacnet.net
203.81.36.33	A+PTR	smtpgate3.pacific.net.sg
203.81.36.34	PTR	smtpgate3-1.pacific.net.sg
203.81.36.36	PTR	dnsproxy3.pacific.net.sg
203.81.36.42	A+PTR	smtpgate10.pacific.net.sg
203.81.36.42	A	smtpgate3.pacific.net.sg
203.81.36.42	A	smtpgate3-1.pacific.net.sg
203.81.36.44	A+PTR	appel.pacific.net.sg
203.81.36.51	A	mx2.pacific.net.sg
203.81.36.52	A	conduit2.pacific.net.sg
203.81.36.53	A	dequeue2.pacific.net.sg
203.81.36.56	A+PTR	cousot.pacific.net.sg
203.81.36.84	A+PTR	catalogue4-old.pacific.net.sg
203.81.36.92	A+PTR	dns2.pacific.net.sg
203.81.36.92	A	xn--xkrx9ksw0cruk.cn
203.81.36.92	A	dns2.pacnet.com
203.81.36.255	PTR	203-81-36-255.revdns.pacificinternet.com
203.81.37.122	A	xn--fjqv3srq0b4ka.cn
203.81.37.133	PTR	pacsg.connect.com.sg
203.81.37.133	A	mail.printjunction.com
203.81.37.136	PTR	sg6.hostsoln.com
203.81.37.137	PTR	sg7.hostsoln.com
203.81.37.138	PTR	sg8.hostsoln.com
203.81.37.180	A	ns2.franslay.net
203.81.37.194	PTR	ns1.rp.com.sg
203.81.37.195	PTR	ns2.rp.com.sg
203.81.37.196	PTR	ns2.rp.com.sg
203.81.37.200	PTR	mail.nortechs.com.sg
203.81.37.201	PTR	lion.hw247.com
203.81.37.202	A	tiger.hw247.com
203.81.37.203	PTR	chamoxa.chamoxa.com
203.81.37.208	PTR	shark.hw247.com
203.81.37.218	PTR	dragon.hw247.com
203.81.37.233	A	tas.staero.aero
203.81.37.245	PTR	mail.powerwebbing.com
203.81.37.251	PTR	mail2.addictis.com
203.81.37.251	A	dellpartnerasia.com
203.81.37.253	PTR	addictis.com
203.81.37.253	PTR	mail.addictis.com
203.81.37.254	A	mail.marcomhub.com
203.81.37.254	A	*.marcomhub.com
203.81.37.254	A	lexmarkvista.com