Robtex

Up: 210.245.0.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 210.245.0.0/25
Down right: 210.245.0.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.245.0.10	A	isp-dns2.fpt.vn
210.245.0.10	A	dns12.fpt.vn
210.245.0.10	A	dns2.fpt.vn
210.245.0.11	A+PTR	dns3.fpt.vn
210.245.0.22	A+PTR	isp-mta7.fpt.vn
210.245.0.25	A	mail.creditrepairtips.online
210.245.0.58	A+PTR	dns5.fpt.vn
210.245.0.68	A	fcs.vn
210.245.0.68	A	fptis.com
210.245.0.130	A+PTR	isp-dhcp.fpt.vn
210.245.0.130	A	phone.fpt.vn
210.245.0.130	A	secure.fpt.vn
210.245.0.131	A+PTR	isp-dns1.fpt.vn
210.245.0.131	A	dns11.fpt.vn
210.245.0.131	A	dns1.fpt.vn
210.245.0.132	A+PTR	isp-mta5.fpt.net
210.245.0.132	A	isp-mta5.fpt.vn
210.245.0.136	PTR	han-monintor
210.245.0.139	A+PTR	isp-radius5.fpt.vn
210.245.0.140	A+PTR	isp-radius4.fpt.vn
210.245.0.141	PTR	is-radius3.fpt.vn
210.245.0.142	A+PTR	isp-webmail.fpt.vn
210.245.0.142	A	isp-mail.fpt.vn
210.245.0.143	A+PTR	isp-radius1.fpt.vn
210.245.0.144	A+PTR	isp-radius2.fpt.vn
210.245.0.145	A+PTR	isp-fw.fpt.vn
210.245.0.146	A+PTR	isp-www.fpt.vn
210.245.0.146	A	book.fpt.vn
210.245.0.146	A	trade.fpt.vn
210.245.0.147	A+PTR	isp-msrv.fpt.vn
210.245.0.147	A	imail.fpt.vn
210.245.0.148	A+PTR	isp-web.fpt.vn
210.245.0.150	A+PTR	isp-mta2.fpt.vn
210.245.0.150	A	isp-fmta.fpt.vn
210.245.0.150	A	smtp.fpt.vn
210.245.0.151	A+PTR	isp-mta3.fpt.vn
210.245.0.151	A	isp-fmta.fpt.vn
210.245.0.151	A	smtp.fpt.vn
210.245.0.152	PTR	isp-vne2.vnexpress.net
210.245.0.155	A+PTR	isp-inside.fpt.vn
210.245.0.155	A	billing.fpt.vn
210.245.0.158	A	anh.fpt.vn
210.245.0.160	PTR	isp-solohn.fpt.vn
210.245.0.161	A+PTR	isp-fcmail.fpt.net
210.245.0.161	A	isp-mta6.fpt.vn
210.245.0.161	A	isp-fcmail.fpt.net.vn
210.245.0.166	A+PTR	isp-exch1.fpt.vn
210.245.0.167	A+PTR	isp-exch2.fpt.vn
210.245.0.168	A+PTR	isp-mta4.fpt.vn
210.245.0.168	A	isp-mta4.fpt.net
210.245.0.169	A+PTR	isp-man1.fpt.vn
210.245.0.170	A+PTR	isp-fmb.fpt.vn
210.245.0.172	A+PTR	isp-mta1.fpt.vn
210.245.0.172	A	isp-mta.fpt.vn
210.245.0.175	PTR	lyncse.fpt.net
210.245.0.175	A	isp-relay.fpt.vn
210.245.0.178	PTR	isp-radius7.fpt.vn
210.245.0.178	A	isp-insidehn.fpt.vn
210.245.0.180	A+PTR	fdns1.fpt.vn
210.245.0.180	A	isp-fdns1.fpt.vn
210.245.0.181	PTR	isp-www1.fpt.vn
210.245.0.181	A	vcbholding.com
210.245.0.181	A	vaomang.com
210.245.0.182	A	isp-member1.fpt.vn
210.245.0.182	A	inside.fpt.vn
210.245.0.187	A+PTR	bulkmail.fpt.net
210.245.0.187	A	dns-vne-sg.fpt.vn
210.245.0.187	A	mta3.fpt.net
210.245.0.202	A	lyncse.fpt.net
210.245.0.220	A	rt.fpt.net
210.245.0.225	A	isp-mail.fpt.vn