duonganh.edu.vn.	30 IN SOA ns1.dotvndns.vn. hostmaster.duonganh.edu.vn. (
				2026040903 ; serial
				14400      ; refresh (4 hours)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				86400      ; minimum (1 day)
				)

duonganh.edu.vn.	30 IN A	103.9.157.235

Name servers:
duonganh.edu.vn.	30 IN NS ns1.dotvndns.vn.
duonganh.edu.vn.	30 IN NS nsbak.dotvndns.com.
duonganh.edu.vn.	30 IN NS ns2.dotvndns.vn.
duonganh.edu.vn.	30 IN NS ns3.dotvndns.vn.