Servidores DNS Principal (mname) y Secundario (rname)
host: xtra7.com
class: IN
ttl: 1800
type: SOA
mname: adam.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2343353913
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Información TXT
host: xtra7.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 redirect=_spf.mailhostbox.com
entries: Array