Registro DMARC
v=DMARC1; p=reject; rua=mailto:report@dmarc.amazon.com; ruf=mailto:report@dmarc.amazon.com

Registro IPv4
host: amazon-adsystem.com
class: IN
ttl: 255
type: A
ip: 52.205.243.115

Registro IPv4
host: amazon-adsystem.com
class: IN
ttl: 255
type: A
ip: 54.145.59.57

Registro IPv4
host: amazon-adsystem.com
class: IN
ttl: 255
type: A
ip: 52.200.46.40

Servidores DNS Principal (mname) y Secundario (rname)
host: amazon-adsystem.com
class: IN
ttl: 7200
type: SOA
mname: dns-external-route53.us-east-1.amazonaws.com
rname: root.amazon.com
serial: 201
refresh: 3600
retry: 900
expire: 604800
minimum-ttl: 60

Información TXT
host: amazon-adsystem.com
class: IN
ttl: 900
type: TXT
txt: v=spf1 -all
entries: