Registro DMARC
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Registro IPv4
host: Visa.mx
class: IN
ttl: 300
type: A
ip: 172.65.64.16

Registro IPv4
host: Visa.mx
class: IN
ttl: 300
type: A
ip: 172.65.64.17

Servidores DNS Principal (mname) y Secundario (rname)
host: Visa.mx
class: IN
ttl: 1800
type: SOA
mname: ns1.dnsvisa.com
rname: dns.cloudflare.com
serial: 2362081676
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Información TXT
host: Visa.mx
class: IN
ttl: 1607
type: TXT
txt: 0 contactemail hostmaster@visa.com
entries: Array