Registro IPv4
host: Doulingo.com
class: IN
ttl: 1121
type: A
ip: 104.247.81.99

Servidores DNS Principal (mname) y Secundario (rname)
host: Doulingo.com
class: IN
ttl: 19121
type: SOA
mname: ns1.parkingcrew.net
rname: hostmaster.Doulingo.Com
serial: 1787921496
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 86400