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

Registro IPv4
host: first1.us
class: IN
ttl: 306
type: A
ip: 13.248.213.45

Registro IPv4
host: first1.us
class: IN
ttl: 306
type: A
ip: 76.223.67.189

Servidores DNS Principal (mname) y Secundario (rname)
host: first1.us
class: IN
ttl: 3307
type: SOA
mname: pdns03.domaincontrol.com
rname: dns.jomax.net
serial: 2026060201
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 600