Registro DMARC
v=DMARC1; p=none;

Registro IPv4
host: libertyclassroom.com
class: IN
ttl: 90
type: A
ip: 164.90.139.243

Servidores DNS Principal (mname) y Secundario (rname)
host: libertyclassroom.com
class: IN
ttl: 3601
type: SOA
mname: dns1.registrar-servers.com
rname: hostmaster.registrar-servers.com
serial: 1787764614
refresh: 43200
retry: 3600
expire: 604800
minimum-ttl: 3601