Robtex

Up: 210.245.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 210.245.28.0/23
Down right: 210.245.30.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.245.28.101	A	nhanthang.com
210.245.28.101	A	tpl-intl.com
210.245.28.180	PTR	mail2.theodorealexander.com
210.245.28.180	A	venussystem.com
210.245.28.180	A	mail.venussystem.com
210.245.28.205	A	sprintavn.com
210.245.28.205	A	*.sprintavn.com
210.245.28.206	A	mail.sprintavn.com
210.245.28.222	PTR	mail.scb.com.vn
210.245.29.198	PTR	chingluh.com.vn
210.245.29.198	PTR	mail.chingluh.com.vn
210.245.29.219	PTR	fuluh.com.vn
210.245.29.219	PTR	mail.fuluh.com.vn
210.245.30.50	PTR	tppc.com.vn
210.245.30.82	PTR	mx.vinacapital.com
210.245.30.83	A+PTR	in.vinacapital.com
210.245.30.84	A+PTR	mx2.vinacapital.com
210.245.30.148	A	mailinhapp.com
210.245.30.150	A+PTR	mail.mailinh.vn
210.245.30.158	A+PTR	mail.mailinhcorporation.vn
210.245.30.200	PTR	mail.lgvinacosmetics.com.vn
210.245.30.218	PTR	mail.sp.ssbshoes.com
210.245.31.3	A	welbutech.com
210.245.31.3	A	mail.ytecopharmacy.com
210.245.31.7	PTR	proxy.hcm.fpt.vn
210.245.31.10	A	dns14.fpt.vn
210.245.31.10	A	dns2.hcm.fpt.vn
210.245.31.11	A+PTR	mta1.fpt.net
210.245.31.12	PTR	mta2.fpt.net
210.245.31.15	A	proxy.hcm.fpt.vn
210.245.31.16	A	proxy.hcm.fpt.vn
210.245.31.20	A	dns3.hcm.fpt.vn
210.245.31.21	A	proxy.hcm.fpt.vn
210.245.31.21	A	w21.vnexpress.net
210.245.31.22	A	w22.vnexpress.net
210.245.31.29	A+PTR	mta01.hcm.fpt.vn
210.245.31.29	A	isp-mta.hcm.fpt.vn
210.245.31.30	A+PTR	mta02.hcm.fpt.vn
210.245.31.30	A	isp-mta.hcm.fpt.vn
210.245.31.34	PTR	ptv.gate.vn
210.245.31.34	PTR	www.pristontale.com.vn
210.245.31.36	PTR	mail.ptv.com.vn
210.245.31.61	PTR	game.gate.vn
210.245.31.61	PTR	mail.muonline.vn
210.245.31.98	A	mail.gso.gov.vn
210.245.31.100	A	www.gso.gov.vn
210.245.31.100	A	gso.gov.vn
210.245.31.102	PTR	static.fpt.vn
210.245.31.102	A	mail.gso.gov.vn
210.245.31.102	A	ns1.gso.gov.vn
210.245.31.113	A	thongketacdongcovid19.gso.gov.vn
210.245.31.113	A	mail.unilever.com.cn
210.245.31.113	A	thongkedoanhnghiep.gso.gov.vn
210.245.31.124	PTR	static.fpt.vn
210.245.31.124	A	anhbangke.gso.gov.vn
210.245.31.130	A	isp-web.hcm.fpt.vn
210.245.31.130	A	otosaigon.com.vn
210.245.31.130	A	fptdata.com.vn
210.245.31.131	PTR	isp-mail.hcm.fpt.vn
210.245.31.131	PTR	isp-mailex.hcm.fpt.vn
210.245.31.133	A+PTR	isp-mta4.hcm.fpt.vn
210.245.31.134	A	smtp.hcm.fpt.vn
210.245.31.135	A	smail6.hcm.fpt.vn
210.245.31.136	PTR	vir-isp02.hcm.fpt.vn
210.245.31.138	A+PTR	isp-bak.hcm.fpt.vn
210.245.31.138	A+PTR	monitor.hcm.fpt.vn
210.245.31.144	A	isp-monitor.hcm.fpt.vn
210.245.31.146	A+PTR	isp-mta3.hcm.fpt.vn
210.245.31.146	PTR	smtp.hcm.fpt.vn
210.245.31.147	A	nm.hcm.fpt.vn
210.245.31.165	PTR	isp-insg.hcm.fpt.vn
210.245.31.167	A+PTR	isp-dstore.hcm.fpt.vn
210.245.31.170	A+PTR	mrtg.hcm.fpt.vn
210.245.31.170	A+PTR	traffic.hcm.fpt.vn
210.245.31.170	A	fdns2.fpt.vn
210.245.31.174	A+PTR	isp-mta6.hcm.fpt.vn
210.245.31.176	PTR	ogvn.com
210.245.31.176	PTR	ogvn.net
210.245.31.177	PTR	isp-newmail.fpt.net
210.245.31.177	A	mail.vnexpress.net
210.245.31.177	A	smtp.vnexpress.net
210.245.31.178	A+PTR	nm.hcm.fpt.vn
210.245.31.178	A	app.hcm.fpt.vn
210.245.31.181	A+PTR	smail2.hcm.fpt.vn
210.245.31.184	A+PTR	smail4.hcm.fpt.vn
210.245.31.185	A+PTR	smail5.hcm.fpt.vn
210.245.31.220	A	datvuonlai.com