Registro IPv4
host: urlshorteningservicefortwitter.com
class: IN
ttl: 21600
type: A
ip: 194.103.212.87

Servidores DNS Principal (mname) y Secundario (rname)
host: urlshorteningservicefortwitter.com
class: IN
ttl: 21600
type: SOA
mname: urlshorteningservicefortwitter.com
rname: hostmaster.urlshorteningservicefortwitter.com
serial: 1
refresh: 604800
retry: 86400
expire: 2419200
minimum-ttl: 604800

Servidor de Correo
host: urlshorteningservicefortwitter.com
class: IN
ttl: 21600
type: MX
pri: 10
target: a.mx.urlshorteningservicefortwitter.com