Robtex

Up: 202.172.4.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 202.172.4.0/24
Down right: 202.172.5.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
202.172.4.10	A	www.vietnamobile.com.vn
202.172.4.10	A	htmobile.com.vn
202.172.4.11	A+PTR	dns1.vietnamobile.com.vn
202.172.4.11	A	dns1.htmobile.net.vn
202.172.4.12	A+PTR	dns2.vietnamobile.com.vn
202.172.4.12	A	dns2.htmobile.com.vn
202.172.4.12	A	dns2.vietnamobile3g.com.vn
202.172.4.15	A+PTR	mail.vietnamobile.com.vn
202.172.4.15	A	mail.htmobile.com.vn
202.172.4.18	A+PTR	smsmgr.vietnamobile.com.vn
202.172.4.20	A	vietnamobile3g.com.vn
202.172.4.21	PTR	banhangtructuyen.vietnamobile.com.vn
202.172.4.22	A+PTR	game.vietnamobile.com.vn
202.172.4.23	A+PTR	hotrodaily.vietnamobile.com.vn
202.172.4.24	PTR	funvoice.vietnamobile.com.vn