Registro IPv4
host: esm.vn
class: IN
ttl: 300
type: A
ip: 103.2.225.29

Servidores DNS Principal (mname) y Secundario (rname)
host: esm.vn
class: IN
ttl: 3600
type: SOA
mname: ns1.zonedns.vn
rname: root.esm.vn
serial: 2025021802
refresh: 1200
retry: 600
expire: 1209600
minimum-ttl: 3600