Robtex

Up: 203.123.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 203.123.0.0/21
Down right: 203.123.8.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.123.0.218	PTR	218.203-123-0.ngn.m1net.com.sg
203.123.1.2	PTR	avxasia.com.sg
203.123.1.18	PTR	harryelias.com.sg
203.123.1.51	PTR	fhl.com.sg
203.123.1.51	PTR	51.203-123-1.leased-203-123-1.qala.com.sg
203.123.1.70	A	www.labroy.com.sg
203.123.1.74	A	mail1.drydocks-graha.com
203.123.1.74	A	labroy.com.sg
203.123.1.74	A	mail.labroy.com.sg
203.123.1.80	PTR	80.203-123-1.leased-203-123-1.qala.com.sg
203.123.1.163	PTR	ipco.com.sg
203.123.2.4	A+PTR	4.203-123-2.1500adsl.qala.com.sg
203.123.2.5	A	5.203-123-2.1500adsl.qala.com.sg
203.123.2.6	A	6.203-123-2.1500adsl.qala.com.sg
203.123.2.9	A	astigroup.com
203.123.2.18	A+PTR	18.203-123-2.1500adsl.qala.com.sg
203.123.2.22	A	22.203-123-2.1500adsl.qala.com.sg
203.123.2.24	A	24.203-123-2.1500adsl.qala.com.sg
203.123.2.29	A	29.203-123-2.1500adsl.qala.com.sg
203.123.2.32	PTR	32.203-123-2.1500adsl.qala.com.sg
203.123.2.35	A+PTR	35.203-123-2.1500adsl.qala.com.sg
203.123.2.37	A	37.203-123-2.1500adsl.qala.com.sg
203.123.2.43	A	43.203-123-2.1500adsl.qala.com.sg
203.123.2.44	A	44.203-123-2.1500adsl.qala.com.sg
203.123.2.51	A+PTR	51.203-123-2.1500adsl.qala.com.sg
203.123.2.61	A	61.203-123-2.1500adsl.qala.com.sg
203.123.2.62	A	62.203-123-2.1500adsl.qala.com.sg
203.123.2.66	A+PTR	66.203-123-2.1500adsl.qala.com.sg
203.123.2.73	A	73.203-123-2.1500adsl.qala.com.sg
203.123.2.85	A	85.203-123-2.1500adsl.qala.com.sg
203.123.2.87	A	87.203-123-2.1500adsl.qala.com.sg
203.123.2.99	A+PTR	99.203-123-2.1500adsl.qala.com.sg
203.123.2.103	A	103.203-123-2.1500adsl.qala.com.sg
203.123.2.105	A	105.203-123-2.1500adsl.qala.com.sg
203.123.2.106	A	106.203-123-2.1500adsl.qala.com.sg
203.123.2.112	A+PTR	112.203-123-2.1500adsl.qala.com.sg
203.123.2.114	A+PTR	114.203-123-2.1500adsl.qala.com.sg
203.123.2.125	A	125.203-123-2.1500adsl.qala.com.sg
203.123.2.127	A	127.203-123-2.1500adsl.qala.com.sg
203.123.2.128	PTR	128.203-123-2.leased-203-123-2.qala.com.sg
203.123.2.130	PTR	130.203-123-2.leased-203-123-2.qala.com.sg
203.123.2.145	PTR	145.203-123-2.leased-203-123-2.qala.com.sg
203.123.2.145	A	mail.geosoft.sg
203.123.2.146	PTR	146.203-123-2.leased-203-123-2.qala.com.sg
203.123.2.146	A	mail.lubanix.com
203.123.2.147	PTR	147.203-123-2.leased-203-123-2.qala.com.sg
203.123.2.147	A	www.lubanix.com
203.123.2.147	A	lubanix.com
203.123.2.161	PTR	router.mpfsc.org.sg
203.123.2.178	PTR	178.203-123-2.leased-203-123-2.qala.com.sg
203.123.2.195	PTR	195.203-123-2.leased-203-123-2.qala.com.sg
203.123.2.227	PTR	flexnt1.flextech.com.sg
203.123.2.241	PTR	router.leosin.com.sg
203.123.2.245	PTR	galeleo.com
203.123.3.8	A	ns2.swiftech.net.sg
203.123.3.8	A	nx.swiftech.net.sg
203.123.3.130	PTR	130.203-123-3.static.qala.com.sg
203.123.3.130	A	simedarby.com.sg
203.123.3.130	A	www.simedarby.com.sg
203.123.3.138	A	ns1.diyregistrar.com
203.123.3.144	PTR	144.203-123-3.static.qala.com.sg
203.123.3.163	A	moxa2.swiftech.net.sg
203.123.3.225	PTR	225.203-123-3.static.qala.com.sg
203.123.4.179	A	179.203-123-4.adsl.qala.com.sg
203.123.5.26	A	sh-cogent.com.sg
203.123.5.51	PTR	51.203-123-5.ngn.m1net.com.sg
203.123.5.51	A	elna-sin.com.sg
203.123.5.60	A	mail.chs.moe.edu.sg
203.123.5.98	PTR	www.pub.gov.sg
203.123.6.8	A	8.203-123-6.adsl.qala.com.sg
203.123.6.9	A	9.203-123-6.adsl.qala.com.sg
203.123.6.12	A	presidium-instruments.com
203.123.6.14	A	14.203-123-6.adsl.qala.com.sg
203.123.6.21	A	21.203-123-6.adsl.qala.com.sg
203.123.6.29	A	29.203-123-6.adsl.qala.com.sg
203.123.6.32	PTR	32.203-123-6.adsl.qala.com.sg
203.123.6.35	A	35.203-123-6.adsl.qala.com.sg
203.123.6.42	A	42.203-123-6.adsl.qala.com.sg
203.123.6.43	A	43.203-123-6.adsl.qala.com.sg
203.123.6.58	A	58.203-123-6.adsl.qala.com.sg
203.123.6.218	A	218.203-123-6.1500adsl.qala.com.sg
203.123.6.252	A	252.203-123-6.1500adsl.qala.com.sg
203.123.7.148	A	ns1.kbassociates.org
203.123.7.150	A	exch.kbassociates.org
203.123.7.157	A	bankofindia.com.sg
203.123.7.162	PTR	mainsmtp.as.eculine.net
203.123.7.162	A	ecusin.eculine.net
203.123.8.2	A+PTR	qmax1.swiftech.net.sg
203.123.8.3	A+PTR	blackbox.swiftech.net.sg
203.123.8.3	A	swiftech.net.sg
203.123.8.3	A	pop.swiftech.net.sg
203.123.8.16	A+PTR	porta2.swiftech.net.sg
203.123.8.16	A	seager.com.sg
203.123.8.18	A+PTR	moxa3.swiftech.com.sg
203.123.8.19	A	backup.swiftech.com.sg
203.123.8.34	A+PTR	sparkie2.swiftech.net.sg
203.123.8.35	A+PTR	ipfone.swiftech.net.sg
203.123.8.40	A	warlord.swiftech.net.sg
203.123.8.74	A	enterprise.swiftech.net.sg
203.123.8.75	A	veron.swiftech.net.sg
203.123.8.89	A	sparkie.swiftech.net.sg
203.123.8.115	PTR	www.edmbooks.com
203.123.8.116	A	cfwin2k.swiftech.net.sg
203.123.8.121	A	regofix.com
203.123.8.121	A	rheintec.com.sg
203.123.8.121	A	a.mx.carbirod.com
203.123.8.130	PTR	asianclassics.com
203.123.8.130	A	www.p2.com.sg
203.123.8.130	A	mail.p2.com.sg
203.123.8.133	PTR	edmbooks.com
203.123.8.136	PTR	hovicha.com
203.123.8.164	PTR	3rings.com.sg
203.123.8.193	A	cf01.swiftech.net.sg
203.123.8.231	PTR	imgsportsclub.com
203.123.8.250	PTR	ns2.digitaldevelopment.com
203.123.9.227	PTR	227.203-123-9.leased.qala.com.sg
203.123.10.4	PTR	4.203-123-10.leased-ilink.qala.com.sg
203.123.10.7	PTR	7.203-123-10.leased-ilink.qala.com.sg
203.123.10.17	PTR	melissa.t-est.com
203.123.10.18	PTR	mail.getaxocean.com
203.123.10.53	PTR	53.203-123-10.leased-ilink.qala.com.sg
203.123.10.72	PTR	72.203-123-10.leased-ilink.qala.com.sg
203.123.10.99	A	mail.fktc.sg
203.123.10.112	PTR	112.203-123-10.leased-ilink.qala.com.sg
203.123.10.140	PTR	140.203-123-10.leased-ilink.qala.com.sg
203.123.10.175	PTR	175.203-123-10.leased-ilink.qala.com.sg
203.123.10.177	PTR	177.203-123-10.leased-ilink.qala.com.sg
203.123.10.178	PTR	178.203-123-10.leased-ilink.qala.com.sg
203.123.10.178	A	mail1.lightway-corpsvcs.com
203.123.10.178	A	www.lightway-corpsvcs.com
203.123.10.192	PTR	192.203-123-10.leased-ilink.qala.com.sg
203.123.10.210	PTR	210.203-123-10.leased-ilink.qala.com.sg
203.123.10.210	A	neogroupsg.com
203.123.10.229	PTR	en605.enservers.com
203.123.10.249	PTR	249.203-123-10.leased-ilink.qala.com.sg
203.123.11.1	PTR	1.203-123-11.ilabs.com.sg
203.123.11.12	A	sg.ilabs.com.sg
203.123.11.13	A	panasiamarine.com
203.123.11.13	A	autocare.com.sg
203.123.11.13	A	www.kriston.com
203.123.11.15	A	sterlingknight.com
203.123.11.16	PTR	mail.hosting.com.sg
203.123.11.16	A	pop.kodaltd.com.sg
203.123.11.16	A	mail.naturerise.com
203.123.11.17	PTR	mx2.hosting.com.sg
203.123.11.17	A	merak.hosting.com.sg
203.123.11.18	PTR	mx.hosting.com.sg
203.123.11.67	PTR	www.caviar.com.sg
203.123.11.67	PTR	67.203-123-11.ilabs.com.sg
203.123.11.113	PTR	113.203-123-11.ilabs.com.sg
203.123.11.113	A	www.help.sg
203.123.11.147	PTR	147.203-123-11.ilabs.com.sg
203.123.11.201	A	ns1.hosting.com.sg
203.123.11.202	A	ns2.hosting.com.sg
203.123.11.208	PTR	ns2.diyregistrar.com
203.123.11.224	PTR	224.203-123-11.ilabs.com.sg
203.123.11.224	A	naturerise.com
203.123.11.224	A	redirectors.com
203.123.12.1	A	alpha003.swiftech.net.sg
203.123.12.7	PTR	7.203-123-12.qala.com.sg
203.123.12.7	A	www.icellwireless.net
203.123.12.7	A	icellwireless.net
203.123.12.20	A	loxy.swiftech.net.sg
203.123.12.128	A	walter.swiftech.net.sg
203.123.12.137	A	vagabond.swiftech.net.sg
203.123.12.142	A	ice.swiftech.net.sg
203.123.12.151	PTR	151.203-123-12.qala.com.sg
203.123.12.151	A	smoov.me
203.123.12.151	A	www.smoov.me
203.123.12.170	A	www.icellnetwork.com
203.123.12.254	PTR	254.203-123-12.qala.com.sg
203.123.13.25	A	popstar1.swiftech.net.sg
203.123.13.96	PTR	96.203-123-13.qala.com.sg
203.123.13.96	A	mail.namecard.sg
203.123.13.96	A	ns1.namecard.sg
203.123.13.97	PTR	97.203-123-13.qala.com.sg
203.123.13.192	PTR	192.203-123-13.qala.com.sg
203.123.13.223	A	blueprintmedia.biz
203.123.13.223	A	phoenixfilmawards.com
203.123.13.223	A	ns1.radcityasia.net
203.123.13.224	PTR	224.203-123-13.qala.com.sg
203.123.15.172	A	incoming.telogic.sg
203.123.15.173	A	mail2.telogic.com.sg
203.123.15.173	A	telogic.sg
203.123.15.254	PTR	254.203-123-15.leased.qala.com.sg