Servidores DNS Principal (mname) y Secundario (rname)
host: edu.mx
class: IN
ttl: 1800
type: SOA
mname: m.mx-ns.mx
rname: hostmaster.nic.mx
serial: 1768816915
refresh: 900
retry: 900
expire: 604800
minimum-ttl: 1800

Información TXT
host: edu.mx
class: IN
ttl: 21600
type: TXT
txt: v=spf1 -all
entries: Array