Registro DMARC
v=DMARC1; p=reject; rua=mailto:dmarc_agg@vali.email

Registro IPv4
host: syn1net.com
class: IN
ttl: 300
type: A
ip: 172.67.139.219

Registro IPv4
host: syn1net.com
class: IN
ttl: 300
type: A
ip: 104.21.65.23

Servidores DNS Principal (mname) y Secundario (rname)
host: syn1net.com
class: IN
ttl: 1800
type: SOA
mname: jo.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2413414661
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800