Servidores DNS Principal (mname) y Secundario (rname)
host: educastur.com
class: IN
ttl: 3600
type: SOA
mname: dns.asturias.es
rname: admin.asturias.es
serial: 2023071901
refresh: 3600
retry: 7200
expire: 1728000
minimum-ttl: 3600