Robtex

Up: 210.245.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 210.245.4.0/23
Down right: 210.245.6.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.245.4.17	A	niags.com.vn
210.245.4.19	A	nocnba.com
210.245.4.19	A	harevn.com
210.245.4.35	PTR	mail.ncivn.vn
210.245.4.43	A+PTR	mail.shws.com.vn
210.245.4.70	PTR	mail.cavicovn.com
210.245.4.131	PTR	mail.inax.com.vn
210.245.5.99	A	uvsvr01.usol-v.com.vn
210.245.5.101	PTR	mail.vietinbanksc.com.vn
210.245.5.116	A	mail.pvfc.vn
210.245.5.126	A+PTR	smtp.pvfc.com.vn
210.245.5.148	PTR	mail.luvina.net
210.245.5.148	A	*.luvina.net
210.245.5.149	A+PTR	mail.luvina.net
210.245.5.230	A	exchange1.vietcombank.com.vn
210.245.6.6	PTR	mail.ntc.com.vn
210.245.6.66	A+PTR	vn.cdc.gov
210.245.6.77	PTR	vn.cdc.gov
210.245.6.200	PTR	mail.haprogroup.vn
210.245.6.210	A	edge.haprovietnam.vn
210.245.7.1	A	vpn.fpt.com.vn
210.245.7.5	A	adfs.fpt.com.vn
210.245.7.12	A	gadonvietnam.net
210.245.7.12	A	canhkhuyen.com
210.245.7.12	A	www.gadonvietnam.net
210.245.7.18	A+PTR	mail.vatm.vn
210.245.7.20	A	vanphongdientu.vatm.vn
210.245.7.20	A	www.vanphongdientu.vatm.vn
210.245.7.21	A+PTR	mail.attech.com.vn
210.245.7.21	A	webmail.attech.com.vn
210.245.7.40	A	www.och.vn
210.245.7.40	A	och.vn
210.245.7.41	PTR	mail.htmobile.com.vn
210.245.7.41	A	www.eves.com.vn
210.245.7.41	A	ocs.com.vn
210.245.7.51	A	mail.eves.com.vn
210.245.7.51	A	mail.ocs.com.vn
210.245.7.53	A+PTR	mail.oceangroup.vn
210.245.7.53	A+PTR	mail.och.vn
210.245.7.53	A	mail.oceanhospitality.vn
210.245.7.115	PTR	mail.byokane.com.vn
210.245.7.233	A	mail.viviet.vn
210.245.7.245	A	smtp1.toyotavn.com.vn