Servidores DNS Principal (mname) y Secundario (rname)
host: vr315.com
class: IN
ttl: 90
type: SOA
mname: jm1.alidns.com
rname: hostmaster.hichina.com
serial: 2024052412
refresh: 3600
retry: 1200
expire: 86400
minimum-ttl: 30