Servidores DNS Principal (mname) y Secundario (rname)
host: kpn-interactive.com
class: IN
ttl: 150
type: SOA
mname: shades15.rzone.de
rname: hostmaster.strato-rz.de
serial: 2020061154
refresh: 86400
retry: 7200
expire: 604800
minimum-ttl: 300