Servidores DNS Principal (mname) y Secundario (rname)
host: chothuenhadanang.vn
class: IN
ttl: 309
type: SOA
mname: ns1.zonedns.vn
rname: root.chothuenhadanang.vn
serial: 2026053107
refresh: 1200
retry: 600
expire: 1209600
minimum-ttl: 3600