Servidores DNS Principal (mname) y Secundario (rname)
host: clubzdorov.ru
class: IN
ttl: 21600
type: SOA
mname: ns1.reg.ru
rname: hostmaster.ns1.reg.ru
serial: 1729949286
refresh: 14400
retry: 3600
expire: 604800
minimum-ttl: 10800