vnn.edu.vn.		30 IN SOA ns1.hoidoanhnhan.vn. hostmaster.vnn.edu.vn. (
				2024041405 ; serial
				14400      ; refresh (4 hours)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				86400      ; minimum (1 day)
				)

vnn.edu.vn.		30 IN A	103.162.21.139

Name servers:
vnn.edu.vn.		30 IN NS ns2.hoidoanhnhan.vn.
vnn.edu.vn.		30 IN NS ns3.dotvndns.vn.
vnn.edu.vn.		30 IN NS ns1.hoidoanhnhan.vn.