Robtex

Up: 203.116.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.116.12.0/23
Down right: 203.116.14.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.116.12.21	PTR	atmail1.serialsystem.com
203.116.12.21	A	mail.serialsys.com.hk
203.116.12.21	A	webmail.achieva.co.id
203.116.12.22	PTR	atmail2.serialsystem.com
203.116.12.26	PTR	6h.serialsystem.com
203.116.12.26	A	mail.achievaglobal.com
203.116.12.26	A	mail.serialnetcom.com
203.116.12.90	A	infopub.sgx.com
203.116.12.133	A	mail.bludot.net
203.116.12.133	A	ntdns.bludot.net
203.116.12.133	A	smtp.bludot.net
203.116.12.141	A	thetraveldossier.com
203.116.12.160	PTR	patsnap.com
203.116.12.194	A+PTR	vgate1.tpasia.sg
203.116.12.228	A+PTR	demo.parkroyalhotels.com
203.116.12.228	A+PTR	intranet.parkroyalhotels.com
203.116.13.66	A	pridns.eximfr.com.sg
203.116.13.132	PTR	mail.scape.com.sg
203.116.13.132	A	email.scape.sg
203.116.13.195	A	mail.sgd688.com
203.116.13.196	A	sgd3333.com
203.116.13.197	A	mail.sgd789.com
203.116.13.197	A	www.sgd168.com
203.116.13.197	A	sgd168.com
203.116.13.201	A	sgd333.com
203.116.13.202	A	sgd999.com
203.116.13.202	A	sgd939.com
203.116.13.229	A	mail.creditbureau.com.sg
203.116.14.77	PTR	mx1.icofgroup.com
203.116.14.77	A	mx1.nortalic.com
203.116.14.77	A	mx.ptbima.com
203.116.14.81	A	evvomobility.com
203.116.14.81	A	evvo.solutions
203.116.14.81	A	evvotec.com
203.116.14.197	A	mx2.avaloq.com.sg
203.116.14.243	A	mail.amsingapore.com
203.116.15.26	PTR	saeslsgex08.saesl.com.sg
203.116.15.66	A	goodsphere.net
203.116.15.66	A	www.mobiustechs.com
203.116.15.66	A	remotemonitoringcontrol.com
203.116.15.68	A	www.hostmaster.sg
203.116.15.68	A	dukie.sg
203.116.15.68	A	dukie.com.sg
203.116.15.70	PTR	mx.iwi.com.sg
203.116.15.72	A	mail-srv25.eppower96.com
203.116.15.72	A	eppower96.com
203.116.15.78	A	tera-corp.com
203.116.15.78	A	www15.iwi.com.sg
203.116.15.78	A	betzler-consortium.com
203.116.15.81	A	apparel.com.sg
203.116.15.81	A	www11.nettwerk.com.sg
203.116.15.81	A	wriindia.com
203.116.15.91	PTR	ns1.webhostsg.com
203.116.15.91	A	omega.iwi.com.sg
203.116.15.91	A	xali.com.sg
203.116.15.163	A	www.fujitsu-pcap.com.sg
203.116.15.164	A+PTR	mars.fujitsu-pcap.com.sg
203.116.15.165	A	mercury.fujitsu-pcap.com.sg
203.116.15.169	A	mail.fujitsu-pcap.com.sg
203.116.15.194	A	mail.dtsholdings.com
203.116.15.194	A	mail1.dtsholdings.com
203.116.15.195	A	www.hopshopgo.com
203.116.15.195	A	compraemanda.com
203.116.15.197	A	comluxe.com
203.116.15.198	A	live.comgateway.com
203.116.15.198	A	www.comgateway.com
203.116.15.198	A	secure.comgateway.com
203.116.15.206	A	cgwstage.com
203.116.15.206	A	mail.cgwstage.com
203.116.15.207	A	mail.shopuobladys.com
203.116.15.207	A	shopuobladys.com
203.116.15.208	A	onenow.com
203.116.15.208	A	www.onenow.com
203.116.15.209	A	www.onenow.com
203.116.15.218	A	global-checkout.com
203.116.15.218	A	www.global-checkout.com
203.116.15.218	A	www.globalcheckout.com
203.116.15.221	A	comgateway.com.sg
203.116.15.221	A	mail.comgateway.co.in
203.116.15.221	A	comgateway.biz