Registro DMARC
v=DMARC1; p=none; sp=none; rua=mailto:a@dmarc.facebookmail.com

Registro IPv4
host: fbcdn.net
class: IN
ttl: 90
type: A
ip: 157.240.5.35

Servidores DNS Principal (mname) y Secundario (rname)
host: fbcdn.net
class: IN
ttl: 3600
type: SOA
mname: a.ns.facebook.com
rname: dns.facebook.com
serial: 4207849484
refresh: 14400
retry: 1800
expire: 604800
minimum-ttl: 300

Información TXT
host: fbcdn.net
class: IN
ttl: 7200
type: TXT
txt: google-site-verification=fK7K3F-hT-Pre47WNaVLRyk-_nC0Kc7K-IzagA5gPEw
entries: Array

Información TXT
host: fbcdn.net
class: IN
ttl: 7200
type: TXT
txt: v=spf1 a ~all
entries: Array

Registro IPv6
host: fbcdn.net
class: IN
ttl: 90
type: AAAA
ipv6: 2a03:2880:f104:83:face:b00c::25de