Robtex

Up: 183.91.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 183.91.16.0/22
Down right: 183.91.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
183.91.16.70	A	hcm.ns1.cmcti.vn
183.91.16.80	A+PTR	mail.monitor.cmcti.vn
183.91.16.80	A	monitor.cmcti.vn
183.91.16.83	PTR	static.cmcti.vn
183.91.16.232	PTR	www.cmcti.vn
183.91.17.1	PTR	static.cmcti.vn
183.91.17.2	PTR	static.cmcti.vn
183.91.17.9	PTR	static.cmcti.vn
183.91.17.24	PTR	static.cmcti.vn
183.91.17.50	PTR	static.cmcti.vn
183.91.17.59	PTR	static.cmcti.vn
183.91.17.65	PTR	static.cmcti.vn
183.91.17.72	PTR	static.cmcti.vn
183.91.17.82	PTR	static.cmcti.vn
183.91.17.96	PTR	static.cmcti.vn
183.91.17.106	PTR	static.cmcti.vn
183.91.17.120	PTR	static.cmcti.vn
183.91.17.129	PTR	static.cmcti.vn
183.91.17.136	PTR	static.cmcti.vn
183.91.17.168	PTR	static.cmcti.vn
183.91.17.176	PTR	static.cmcti.vn
183.91.17.187	PTR	static.cmcti.vn
183.91.17.225	PTR	static.cmcti.vn
183.91.17.232	PTR	static.cmcti.vn
183.91.17.234	PTR	static.cmcti.vn
183.91.17.250	PTR	static.cmcti.vn
183.91.18.3	PTR	fbnc.vn
183.91.18.12	A	r1.sn-jhjup-nbol.gvt1.com
183.91.18.13	A	r2---sn-jhjup-nbol.gvt1.com
183.91.18.14	A	r3.sn-jhjup-nbol.googlevideo.com
183.91.18.14	A	r3.sn-jhjup-nbol.gvt1.com
183.91.18.16	A	r5---sn-jhjup-nbol.googlevideo.com
183.91.18.16	A	r5.sn-jhjup-nbol.gvt1.com
183.91.18.17	PTR	static.cmcti.vn
183.91.18.18	PTR	static.cmcti.vn
183.91.18.18	A	r7.sn-jhjup-nbol.gvt1.com
183.91.18.18	A	r7.sn-jhjup-nbol.googlevideo.com
183.91.18.19	PTR	static.cmcti.vn
183.91.18.50	PTR	static.cmcti.vn
183.91.18.130	PTR	static.cmcti.vn
183.91.18.130	A	biendoikhihau.gov.vn
183.91.18.227	PTR	static.cmcti.vn
183.91.18.227	A	hcm-smtp-mx01.cmctelecom.vn
183.91.18.228	A	www.libep.com
183.91.18.228	A	shiphang60s.com
183.91.18.229	A	hcm-smtp-mx01.cmcti.vn
183.91.18.234	A+PTR	hcm-smtp-mx01.cmctelecom.vn
183.91.18.234	A+PTR	hcm-smtp-mx01.cmcti.vn
183.91.18.235	A	mail.cmcti.vn
183.91.18.250	PTR	mtech.vn
183.91.19.6	A	mail.cpm.com.vn
183.91.19.6	A	cpm.com.vn
183.91.19.75	A	e-graduate.hutech.edu.vn
183.91.19.81	PTR	mail.ida.vn
183.91.19.170	PTR	static.cmcti.vn
183.91.19.188	A	mail.tamsinhnghia.vn
183.91.19.188	A	tamsinhnghia.vn
183.91.19.193	PTR	bvdns-int01.baoviet.com.vn
183.91.19.193	PTR	bvdns-int02.baoviet.com.vn
183.91.19.199	A	maudat.com
183.91.19.208	PTR	ktg.com.vn
183.91.19.208	A	ktgland.com.vn
183.91.19.208	A	ktgland.com
183.91.20.2	PTR	static.cmcti.vn
183.91.20.14	A	cmc.is-vietnam.com
183.91.20.14	A	khoitrang.com
183.91.20.14	A	www.khoitrang.com
183.91.20.24	PTR	static.cmcti.vn
183.91.20.67	PTR	static.cmcti.vn
183.91.20.80	PTR	static.cmcti.vn
183.91.20.82	PTR	static.cmcti.vn
183.91.20.82	A	paygate.moca.vn
183.91.20.82	A	moca.vn
183.91.20.96	PTR	static.cmcti.vn
183.91.20.98	PTR	static.cmcti.vn
183.91.20.136	PTR	static.cmcti.vn
183.91.20.217	PTR	static.cmcti.vn
183.91.20.217	A	cmc-bk-link.hsx.vn
183.91.20.218	A+PTR	mail.hsx.vn
183.91.21.89	PTR	static.cmcti.vn
183.91.21.162	PTR	static.cmcti.vn
183.91.21.162	A	tcsc.vn
183.91.21.162	A	www.tcsc.vn
183.91.21.166	A	mx2.tcsc.vn
183.91.21.170	A	mx3.tcsc.vn
183.91.21.177	PTR	static.cmcti.vn
183.91.22.90	A+PTR	mail.vietcapital.com.vn
183.91.22.90	A	webmail.vietcapital.com.vn
183.91.22.129	PTR	mail.daiabank.com.vn
183.91.22.187	PTR	static.cmcti.vn
183.91.22.187	A	mail.starcitysaigon.vn
183.91.22.187	A	vissaisaigonhotel.vn
183.91.22.194	A+PTR	mail.sourcingbase.com
183.91.22.194	A	sourcingbase.com
183.91.22.195	A+PTR	mail.viet-styles.com.vn
183.91.22.197	A	mail.gmt.vn
183.91.22.200	PTR	static.cmcti.vn
183.91.22.200	A	aig-ltd.com
183.91.22.200	A	mail.aig-ltd.com
183.91.22.210	PTR	static.cmcti.vn
183.91.22.210	A	pkmt.joomta.com
183.91.22.210	A	phfm.vn
183.91.22.211	PTR	phs.vn
183.91.22.215	A	mail.phsc.vn
183.91.22.218	PTR	static.cmcti.vn
183.91.22.218	A	mail.phsc.vn
183.91.22.234	PTR	static.cmcti.vn
183.91.23.3	PTR	static.cmcti.vn
183.91.23.57	PTR	static.cmcti.vn
183.91.23.57	A	partner.hdbank.com.vn
183.91.23.59	PTR	static.cmcti.vn
183.91.23.59	A	ebanking.hdbank.vn
183.91.23.59	A	hdbank.com
183.91.23.60	A	owa.hdbank.com.vn
183.91.23.61	A	hdbank.com
183.91.23.64	PTR	static.cmcti.vn
183.91.23.69	A	mail.picmaila.com
183.91.23.69	A	picmaila.com
183.91.23.71	A	www.namcongcam.com
183.91.23.71	A	asiapti.org
183.91.23.82	PTR	static.cmcti.vn
183.91.23.82	A	yrdemo.tk
183.91.23.83	PTR	static.cmcti.vn
183.91.23.140	A	dangnhat.info
183.91.23.140	A	lysvietnamesetranslation.com
183.91.23.200	PTR	static.cmcti.vn