Registro IPv4
host: letter.com.sg
class: IN
ttl: 180
type: A
ip: 88.198.217.223

Servidores DNS Principal (mname) y Secundario (rname)
host: letter.com.sg
class: IN
ttl: 180
type: SOA
mname: ns1.wwdh.hu
rname: root.wwdh.hu
serial: 2022061401
refresh: 43200
retry: 10800
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: letter.com.sg
class: IN
ttl: 180
type: MX
pri: 10
target: mail.mailserver.hu