Registro IPv4
host: duocpham.com
class: IN
ttl: 300
type: A
ip: 202.92.4.11

Servidores DNS Principal (mname) y Secundario (rname)
host: duocpham.com
class: IN
ttl: 3600
type: SOA
mname: ns1.name.com
rname: hostmaster.nsone.net
serial: 1692168111
refresh: 43200
retry: 7200
expire: 1209600
minimum-ttl: 3600