Servidores DNS Principal (mname) y Secundario (rname)
host: fsmcentral.com
class: IN
ttl: 3600
type: SOA
mname: ns1.dnsimple.com
rname: admin.dnsimple.com
serial: 1734799877
refresh: 86400
retry: 7200
expire: 604800
minimum-ttl: 300