Registro IPv4
host: earth2o.com
class: IN
ttl: 300
type: A
ip: 128.136.252.89

Servidores DNS Principal (mname) y Secundario (rname)
host: earth2o.com
class: IN
ttl: 900
type: SOA
mname: ns-123.awsdns-15.com
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400