Servidores DNS Principal (mname) y Secundario (rname)
host: dsl.cantv.net
class: IN
ttl: 21600
type: SOA
mname: localhost.dsl.cantv.net
rname: hostmaster.cantv.net
serial: 2020120101
refresh: 172800
retry: 3600
expire: 1728000
minimum-ttl: 172800

Servidor de Correo
host: dsl.cantv.net
class: IN
ttl: 21600
type: MX
pri: 10
target: relay.cantv.net