Registro DMARC
v=DMARC1; p=none; rua=mailto:mailauth-reports@google.com

Registro IPv4
host: googleusercontent.com
class: IN
ttl: 300
type: A
ip: 216.58.204.161

Servidores DNS Principal (mname) y Secundario (rname)
host: googleusercontent.com
class: IN
ttl: 90
type: SOA
mname: ns1.google.com
rname: dns-admin.google.com
serial: 1021689373
refresh: 900
retry: 900
expire: 1800
minimum-ttl: 60

Información TXT
host: googleusercontent.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 include:_spf.google.com ?all
entries: v=spf1 include:_spf.google.com ?all

Registro IPv6
host: googleusercontent.com
class: IN
ttl: 300
type: AAAA
ipv6: 2a00:1450:4003:811::2001