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

Registro IPv4
host: a.co
class: IN
ttl: 432
type: A
ip: 54.239.21.27

Registro IPv4
host: a.co
class: IN
ttl: 432
type: A
ip: 54.239.20.248

Registro IPv4
host: a.co
class: IN
ttl: 432
type: A
ip: 54.239.16.179

Servidores DNS Principal (mname) y Secundario (rname)
host: a.co
class: IN
ttl: 900
type: SOA
mname: dns-external-master.amazon.com
rname: root.amazon.com
serial: 16
refresh: 28800
retry: 900
expire: 604800
minimum-ttl: 900

Información TXT
host: a.co
class: IN
ttl: 900
type: TXT
txt: v=spf1 -all
entries: Array