Robtex

Up: 203.113.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 203.113.144.0/21
Down right: 203.113.152.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.113.144.84	A	mail.spartronics.com
203.113.144.214	A	mail.stickleyinternational.com
203.113.144.220	A	mail.estecphutho.com
203.113.144.221	A	mail.estecvina.com
203.113.145.120	PTR	mail.clovervn.com
203.113.145.149	PTR	mail.acbs.com.vn
203.113.145.204	PTR	mail.acb.com.vn
203.113.145.223	PTR	mail.aict.com.vn
203.113.145.225	A	mailserver.cpvina.com
203.113.146.20	PTR	mail.hmm.com.vn
203.113.146.35	PTR	mail.diltd.com.vn
203.113.146.90	PTR	webmail.lacviet.com.vn
203.113.146.146	PTR	mail.joonsaigon.com
203.113.146.146	PTR	mail.pk-saigontwo.com
203.113.146.146	PTR	mail.pungkookvn.com
203.113.146.182	PTR	mail1.globaldyeing.com
203.113.146.182	A	mail.globalhantex.com
203.113.146.182	A	mail.globaldyeing.com
203.113.146.194	PTR	mail.scavi.com.vn
203.113.146.213	PTR	mail.tvs.vn
203.113.146.235	PTR	mail.hsvina.com
203.113.146.235	A	hsvina.com
203.113.146.235	A	mx3.hsvina.com
203.113.146.238	PTR	mail.hsvina.com
203.113.146.238	A	hsvina.com
203.113.146.238	A	mx3.hsvina.com
203.113.147.11	A+PTR	mail.esprintavn.com
203.113.147.47	A	lqmgarenashop.com
203.113.147.171	PTR	smtp.cathaylife.com.vn
203.113.147.177	A	fit.hcmute.edu.vn
203.113.147.177	A	aao.hcmute.edu.vn
203.113.147.177	A	feee.hcmute.edu.vn
203.113.147.179	PTR	mail1.hcmute.edu.vn
203.113.148.4	A	cvhcm.vinamarine.gov.vn
203.113.148.4	A	mail.cangvuhanghaiquangninh.gov.vn
203.113.148.4	A	mail.cvhcm.vinamarine.gov.vn
203.113.148.17	A	www.chotinhoc.vn
203.113.148.17	A	www.xuanson.vn
203.113.148.17	A	www.voshop.vn
203.113.148.43	A	smtp.vnoffline.com
203.113.148.62	A	hcmpop.vishipel.com.vn
203.113.148.62	A	mail.hcmpop.vishipel.com.vn
203.113.148.129	PTR	dns1.hcmuaf.edu.vn
203.113.148.129	A	nlu.edu.vn
203.113.148.129	A	www.nlu.edu.vn
203.113.148.130	PTR	mail.hcmuaf.edu.vn
203.113.148.131	PTR	aic.hcmuaf.edu.vn
203.113.148.135	A	a17-250-248-101.iaddyou.com
203.113.148.135	A	hcmuaf.edu.vn
203.113.148.180	PTR	mail.hansollvina.com
203.113.148.182	PTR	mail.hansollvina.com
203.113.148.189	PTR	mail.namyangsm.com
203.113.148.195	A+PTR	mail.indovinabank.com.vn
203.113.148.201	A	mail.nhahat5b.com
203.113.151.6	PTR	www.e-t.com.vn
203.113.151.44	A	vn.pyramid-consulting.com
203.113.151.44	A	mail.vn.pyramid-consulting.com
203.113.151.66	A	ads.cp.com.vn
203.113.151.68	A	www.hr.cpvina.com
203.113.151.81	A+PTR	mail.bisvietnam.com
203.113.151.82	A	ns2.bisvietnam.com
203.113.151.123	PTR	sanyoshv.com.vn
203.113.151.124	PTR	aquavietnam.vn
203.113.151.124	PTR	haier.vn
203.113.151.124	PTR	sanyo.com.vn
203.113.151.126	PTR	haier.vn
203.113.151.126	PTR	sanyo.com.vn
203.113.151.126	PTR	sanyoshv.com.vn
203.113.151.131	PTR	mail.thp.com.vn
203.113.151.163	PTR	tbsgroup.vn
203.113.151.163	A	mail.thaibinhshoes.com.vn
203.113.151.163	A	thaibinhshoes.com
203.113.151.178	A	helpdesk.cp.com.vn
203.113.151.182	PTR	mailserver.cp.com.vn
203.113.151.186	A+PTR	mail.lacty.com.vn
203.113.151.186	A	lacty.com.vn
203.113.151.187	A	itg.lacty.com.vn
203.113.151.193	A	dagastech.com
203.113.151.204	A	mx1.pungkookmy.com
203.113.151.209	A	www.pungkookvn.com
203.113.151.235	A	www.yupoong.com.vn
203.113.151.235	A	web.yupoong.com.vn
203.113.151.238	PTR	www.yupoong.com.vn
203.113.152.67	A	reputa.vn
203.113.152.68	A	vtcc.ai
203.113.152.68	A	www.vtcc.ai
203.113.152.68	A	viettelgroup.ai
203.113.152.83	A	reputa.vn
203.113.152.85	A	cyberbot.vn
203.113.152.89	A	vadmob.com
203.113.158.196	PTR	tech.viettel.vn
203.113.158.198	PTR	greenia.com.vn
203.113.158.198	PTR	mshop.com.vn
203.113.158.198	PTR	toquocghicong.com.vn
203.113.159.4	PTR	mail4.polynet.vn
203.113.159.4	A	jts.vn
203.113.159.4	A	shopbeca.com
203.113.159.17	A	dc-70c9c346.thoitranghathanh.net
203.113.159.19	A	hostmaster.imuzic.net
203.113.159.19	A	imuzic.net
203.113.159.23	A	upload.nhacdj.vn
203.113.159.25	A	50.anhsexdep.wapk.us
203.113.159.35	PTR	mail.jts.vn
203.113.159.35	A	audix.vn
203.113.159.35	A	*.vtraco.com
203.113.159.57	A	info.tiechoasen.com
203.113.159.57	A	luatanphuoc.vn
203.113.159.57	A	ns1.tenten.vn.miligiay.com
203.113.159.68	A	kylongcongtu.com
203.113.159.69	A	vuzephyrus.com
203.113.159.86	A	xemsextructuyen.xwap.info
203.113.159.86	A	hackkpah.wapmienphi.com
203.113.159.86	A	50.anhsexdep.wapk.us
203.113.159.97	A	bigbang68.com
203.113.159.97	A	yeugamebai.com
203.113.159.120	A	noithatalpha.com
203.113.159.120	A	www.noithatalpha.com
203.113.159.127	A	mail.khudothimetriha.com
203.113.159.129	A	maychu.com.vn
203.113.159.160	A	volam24h.info
203.113.159.179	A	at.net.vn
203.113.159.179	A	infogame.vn
203.113.159.184	A	tingame.com.vn
203.113.159.186	A	ign.vn
203.113.159.195	A	dc-aa7ecdc9.songkhoetv.net
203.113.159.198	A	unlockvip.net
203.113.159.201	A	mail.sspayment.com
203.113.159.201	A	sspayment.com
203.113.159.222	A	rapviet.vn
203.113.159.222	A	hoantien.vn
203.113.159.222	A	www.putatu.com
203.113.159.250	A	myvienviethan.com
203.113.159.250	A	aramua.com
203.113.159.250	A	phelam.net