Registro DMARC
v=spf1 a ~all

Registro IPv4
host: z-m.c10r.facebook.com
class: IN
ttl: 90
type: A
ip: 157.240.243.37

host: 0.discoverapp.com
class: IN
ttl: 7200
type: CNAME
target: z-m.c10r.facebook.com

Información TXT
host: z-m.c10r.facebook.com
class: IN
ttl: 7200
type: TXT
txt: v=spf1 a ~all
entries: Array

Registro IPv6
host: z-m.c10r.facebook.com
class: IN
ttl: 90
type: AAAA
ipv6: 2a03:2880:f170:85:face:b00c::14c9