Registro IPv4
host: shrtr.link
class: IN
ttl: 21600
type: A
ip: 5.9.75.53

Servidores DNS Principal (mname) y Secundario (rname)
host: shrtr.link
class: IN
ttl: 21600
type: SOA
mname: ns1.first-ns.de
rname: postmaster.robot.first-ns.de
serial: 2015080800
refresh: 14400
retry: 1800
expire: 604800
minimum-ttl: 86400