Robtex

Up: 203.81.32.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.81.36.0/23
Down right: 203.81.38.0/23
(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
203.81.38.4	PTR	fire.corp8.com
203.81.38.4	A	pop.i-tyre.com
203.81.38.4	A	smtp.i-tyre.com
203.81.38.8	A	secdns.8toinfinity.com.sg
203.81.38.8	A	ns2.8toinfinity.com
203.81.38.8	A	ns2.8toinfinity.com.sg
203.81.38.9	A	ix-conference.com
203.81.38.13	A	mail.kellyservices.com.ph
203.81.38.13	A	mail.bticonsultants.com
203.81.38.14	A	sapthaswaram.com
203.81.38.14	A	itunes.my
203.81.38.18	A	farmersupplyhardware.co.za
203.81.38.18	A	hewstonegifts.com
203.81.38.19	A	browsernews.org
203.81.38.19	A	frontrowgrunt.com
203.81.38.22	A	ns1.securefusion.net
203.81.38.23	A	ns2.securefusion.net
203.81.38.26	A	proxy5.remotepc.net
203.81.38.27	PTR	ground.singhost.com
203.81.38.27	A	adasia.com.sg
203.81.38.27	A	gigenetasia.com
203.81.38.29	A	pop.bluestone-corp.com
203.81.38.29	A	mail.cadi.sg
203.81.38.34	PTR	eustance.enodns.com
203.81.38.34	A	gstrea.com
203.81.38.34	A	labuanshipyard.com
203.81.38.36	A	mail.aogsupply.com
203.81.38.36	A	mail.andylau.info
203.81.38.38	PTR	logos.synergies.com.sg
203.81.38.38	A	mail.synergiesgroup.biz
203.81.38.38	A	mail.celdevelopment.com.sg
203.81.38.43	A	conoco.com.my
203.81.38.153	A	mail3.snix.net
203.81.38.154	A	snix.info
203.81.38.154	A	snix.org
203.81.38.163	A	ns1.8.to
203.81.38.164	A	ns2.8.to
203.81.38.171	A	paperconnections.com.sg
203.81.38.171	A	kose.com.sg
203.81.38.171	A	oasisinteractive.com.sg
203.81.38.200	PTR	mail.vooju.com
203.81.38.210	A+PTR	sqtbl1.pacweb.net.sg
203.81.38.211	A	sqtbl2.pacweb.net.sg
203.81.38.212	A	sqtbl3.pacweb.net.sg
203.81.38.213	PTR	mail.finexis.com.sg
203.81.38.218	PTR	hsbcinsagency.com.sg
203.81.38.218	PTR	a13001hsb.hsbcinsagency.com.sg
203.81.38.218	PTR	hub.hsbcinsagency.com.sg
203.81.38.226	PTR	jobconnect.com.sg
203.81.38.228	PTR	jobsfactory.com
203.81.39.39	PTR	mail.vooju.com
203.81.39.219	PTR	brightsparks.com.sg
203.81.39.220	PTR	jobscentral.com.sg
203.81.39.225	PTR	ns1.efair.sg
203.81.39.226	PTR	mail.crejob.com
203.81.39.226	A	cambridgereim.com
203.81.39.226	A	cambridgeipm.com
203.81.39.228	PTR	www.efair.sg
203.81.39.230	PTR	ns2.efair.sg