Robtex

Up: 220.231.120.0/22
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Down left: 220.231.120.0/24
Down right: 220.231.121.0/24

IP	Type	Hostname
220.231.120.0	PTR	localhost
220.231.120.11	PTR	localhost
220.231.120.46	PTR	localhost
220.231.120.56	PTR	localhost
220.231.120.138	PTR	localhost
220.231.121.1	A	viettelvas.vn
220.231.121.1	A	www.viettelvas.vn
220.231.121.12	A+PTR	mrs.mobimail.viettel.com.vn
220.231.121.14	A	mobimail.viettel.com.vn
220.231.121.14	A	imail.vietteltelecom.vn
220.231.121.14	A	www.mobimail.viettel.com.vn
220.231.121.15	A+PTR	mrs2.mobimail.viettel.com.vn
220.231.121.27	A	tracuocadsl.vietteltelecom.vn
220.231.121.96	A+PTR	mail.vietteltelecom.vn