vdc.vn.			30 IN SOA vdc-hn01.vnn.vn. postmaster.vnn.vn. (
				2018041303 ; serial
				300        ; refresh (5 minutes)
				300        ; retry (5 minutes)
				604800     ; expire (1 week)
				600        ; minimum (10 minutes)
				)

vdc.vn.			30 IN A	222.255.29.106

Name servers:
vdc.vn.			30 IN NS hcm-server1.vnn.vn.
vdc.vn.			30 IN NS vdc-hn01.vnn.vn.