Registro DMARC
v=DMARC1; p=reject; adkim=r; aspf=r; rua=mailto:dmarc_rua@onsecureserver.net;

Registro IPv4
host: castraining.com
class: IN
ttl: 600
type: A
ip: 13.248.213.45

Registro IPv4
host: castraining.com
class: IN
ttl: 600
type: A
ip: 76.223.67.189

Servidores DNS Principal (mname) y Secundario (rname)
host: castraining.com
class: IN
ttl: 3600
type: SOA
mname: ns71.domaincontrol.com
rname: dns.jomax.net
serial: 2025050401
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 600