Servidores DNS Principal (mname) y Secundario (rname)
host: soubce.cz
class: IN
ttl: 1800
type: SOA
mname: names.dialtelecom.cz
rname: hostmaster.dialtelecom.cz
serial: 2025071101
refresh: 21600
retry: 900
expire: 1209600
minimum-ttl: 3600