Robtex

Up: 210.245.60.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 210.245.62.0/24
Down right: 210.245.63.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.245.62.44	A+PTR	mail.vngrid.ac.vn
210.245.62.46	PTR	mail.ioit.ac.vn
210.245.62.106	PTR	mail.hbse.vn
210.245.62.106	PTR	mail.hbse.com.vn
210.245.62.107	PTR	mail.hbse.com.vn
210.245.62.108	A	mail.igi.vn
210.245.62.125	PTR	iboxmedia.com
210.245.62.125	PTR	astec.vn
210.245.62.125	PTR	eyenet.vn
210.245.62.126	PTR	astec.vn
210.245.62.130	A	mail.noreply.kls.vn
210.245.62.131	A+PTR	mail.3nana.vn
210.245.62.131	PTR	mail.gli.vn
210.245.62.131	PTR	mail.zaia.vn
210.245.62.134	PTR	smtp.kls.vn
210.245.63.4	PTR	mail.fpts.com.vn
210.245.63.4	A	smtp.fpts.com.vn
210.245.63.5	PTR	mail2.fpts.com.vn
210.245.63.6	PTR	smtp.fpts.com.vn
210.245.63.6	A	mail.fpts.com.vn
210.245.63.29	A	nasb.com.vn
210.245.63.30	A+PTR	mail.nasb.com.vn
210.245.63.86	PTR	vpb.com.vn
210.245.63.125	A	mail.varans.vn
210.245.63.221	A	ptcntt.com
210.245.63.241	PTR	mail.igi.com.vn
210.245.63.246	PTR	mail.igi.vn