Robtex

Up: 203.83.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.83.20.0/23
Down right: 203.83.22.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.83.20.1	PTR	ppp203-83-20-1.l2dsl.online.net.pg
203.83.20.4	A	smtp.posman.com
203.83.20.6	A	mail.badilihardware.com
203.83.20.6	A	anywhere.badilihardware.com
203.83.20.13	PTR	ppp203-83-20-13.l2dsl.online.net.pg
203.83.20.17	PTR	ppp203-83-20-17.l2dsl.online.net.pg
203.83.20.17	A	server2.pngnwtl.com
203.83.20.17	A	mail.pngnwtl.com
203.83.20.21	PTR	ppp203-83-20-21.l2dsl.online.net.pg
203.83.20.41	PTR	ppp203-83-20-41.l2dsl.online.net.pg
203.83.20.53	PTR	ppp203-83-20-53.l2dsl.online.net.pg
203.83.20.53	A	remote.cheshire.org.pg
203.83.20.54	PTR	mail.monier.com.pg
203.83.20.59	PTR	ppp203-83-20-59.l2dsl.online.net.pg
203.83.20.59	A	spp.com.pg
203.83.20.68	A+PTR	mail.finance.gov.pg
203.83.20.68	A+PTR	smtp.finance.gov.pg
203.83.20.92	PTR	ppp203-83-20-92.l2dsl.online.net.pg
203.83.20.92	A	mail.nambawansuper.com.pg
203.83.20.92	A	oph.com.pg
203.83.20.94	PTR	ppp203-83-20-94.l2dsl.online.net.pg
203.83.20.114	PTR	ppp203-83-20-114.l2dsl.online.net.pg
203.83.20.139	A+PTR	ppp203-83-20-139.l2dsl.online.net.pg
203.83.20.140	A	mail.lcc.com.pg
203.83.20.162	A	mail.comserv.com.pg
203.83.20.172	PTR	ppp203-83-20-172.l2dsl.online.net.pg
203.83.20.173	PTR	ppp203-83-20-173.l2dsl.online.net.pg
203.83.20.173	A	www.daltron.com.pg
203.83.20.174	PTR	ppp203-83-20-174.l2dsl.online.net.pg
203.83.20.176	PTR	ppp203-83-20-176.l2dsl.online.net.pg
203.83.20.176	A	mail.freewaymotors.com.pg
203.83.20.241	PTR	ppp203-83-20-241.l2dsl.online.net.pg
203.83.20.252	PTR	mail.nasfund.com.pg
203.83.21.34	A	htmoto.online.net.pg
203.83.21.100	A	luluai.datanets.com.pg
203.83.21.118	A+PTR	mail.pngports.com.pg
203.83.21.134	A	poplinks4.online.net.pg
203.83.21.174	A+PTR	mail.cimcpng.org
203.83.21.194	A+PTR	inapop.online.net.pg
203.83.21.205	A+PTR	mail.cpta.gov.pg
203.83.21.210	A+PTR	mail.irc.gov.pg
203.83.21.210	A	letaboks.irc.gov.pg
203.83.21.230	PTR	mail.gobefieldeng.com.pg
203.83.21.235	A+PTR	mail.insurancepartners.com.pg
203.83.21.254	A+PTR	efpng-mail.efpng.org.pg
203.83.22.1	A+PTR	dc.poplinks4.online.net.pg
203.83.22.2	A+PTR	pom-pppoe.online.net.pg
203.83.22.3	A+PTR	pom-pppoe2.online.net.pg
203.83.22.8	A+PTR	dcmorobe.online.net.pg
203.83.22.22	A+PTR	resolv.online.net.pg
203.83.22.22	A	www.comserv.com.pg
203.83.22.33	PTR	fa0-1-734.poplinks4.online.net.pg
203.83.22.34	PTR	base1.msc-pom.online.net.pg
203.83.22.35	A+PTR	base2.msc-pom.online.net.pg
203.83.22.36	PTR	wilhelm.msc-pom.online.net.pg
203.83.22.38	A+PTR	resolv1.online.net.pg
203.83.22.39	A+PTR	ns1.online.net.pg
203.83.22.39	A	png4.dg.com.pg
203.83.22.39	A	ns1.daltron.net.pg
203.83.22.40	PTR	mail.online.net.pg
203.83.22.40	A	mail.ads.org.pg
203.83.22.40	A	mail.edtc.ac.pg
203.83.22.41	A+PTR	postman.online.net.pg
203.83.22.41	A	mail.pacificfoam.com.pg
203.83.22.42	PTR	insmtp1.online.net.pg
203.83.22.45	A	webmail.online.net.pg
203.83.22.46	A+PTR	web.online.net.pg
203.83.22.46	A	www.bismark.com.pg
203.83.22.46	A	www.citymission.com.pg
203.83.22.47	PTR	sms.online.net.pg
203.83.22.49	A+PTR	monitor.online.net.pg
203.83.22.50	A	chimbu.online.net.pg
203.83.22.52	A+PTR	mailman.online.net.pg
203.83.22.55	A+PTR	base3.online.net.pg
203.83.22.56	A	speedtest.online.net.pg
203.83.22.57	A+PTR	mail.daltron.com.pg
203.83.22.57	A	webmail.daltron.com.pg
203.83.22.59	PTR	cuda1.online.net.pg
203.83.22.218	A+PTR	mail.umw.com.pg
203.83.22.226	A	bougainvillecopper.com.pg
203.83.22.226	A	pomsox.daltron.com.pg
203.83.22.226	A	bougainvillecopperlimited.com.pg
203.83.22.227	A	www.countrytours.com.pg
203.83.22.228	A	raku37.com.pg
203.83.22.228	A	henaos.com.pg
203.83.22.228	A	www.shadyrest.com.pg
203.83.22.229	PTR	resolv2.online.net.pg
203.83.22.231	PTR	mail.online.net.pg
203.83.22.232	PTR	mail.online.net.pg
203.83.22.233	PTR	mail.online.net.pg
203.83.23.161	A+PTR	pom-ixp.online.net.pg
203.83.23.162	A+PTR	pom-ixp-1.online.net.pg
203.83.23.163	A+PTR	pom-ixp-2.online.net.pg
203.83.23.244	PTR	lae-pppoe-nat2.online.net.pg