Registro IPv4
host: 321.vn
class: IN
ttl: 600
type: A
ip: 192.227.148.39

Servidores DNS Principal (mname) y Secundario (rname)
host: 321.vn
class: IN
ttl: 300
type: SOA
mname: ns1.netsto.net
rname: support.netsto.com
serial: 1758453503
refresh: 5400
retry: 3600
expire: 1209600
minimum-ttl: 300