Registro IPv4
host: microsimrail.biz
class: IN
ttl: 90
type: A
ip: 75.2.103.23

Servidores DNS Principal (mname) y Secundario (rname)
host: microsimrail.biz
class: IN
ttl: 90
type: SOA
mname: 208.91.197.91
rname: hostmaster.microsimrail.biz
serial: 1740484564
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600