Servidores DNS Principal (mname) y Secundario (rname)
host: nutrexpa.es
class: IN
ttl: 992
type: SOA
mname: ns1.cdmon.net
rname: hostmaster.nutrexpa.es
serial: 2023030101
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600