Registro IPv4
host: extraton.com
class: IN
ttl: 900
type: A
ip: 51.38.180.8

Servidores DNS Principal (mname) y Secundario (rname)
host: extraton.com
class: IN
ttl: 900
type: SOA
mname: extraton.com
rname: root.extraton.com
serial: 99
refresh: 604800
retry: 86400
expire: 2419200
minimum-ttl: 604800

Servidor de Correo
host: extraton.com
class: IN
ttl: 900
type: MX
pri: 10
target: mail.extraton.com