Servidores DNS Principal (mname) y Secundario (rname)
host: wl.co
class: IN
ttl: 3600
type: SOA
mname: a.ns.whatsapp.net
rname: dns.whatsapp.net
serial: 3875866015
refresh: 14400
retry: 1800
expire: 604800
minimum-ttl: 300

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