Registro IPv4
host: 12lessons.com
class: IN
ttl: 2504
type: A
ip: 208.91.197.27

Servidores DNS Principal (mname) y Secundario (rname)
host: 12lessons.com
class: IN
ttl: 4477
type: SOA
mname: NS13.WORLDNIC.com
rname: namehost.WORLDNIC.com
serial: 113092721
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600