Registro IPv4
host: medkrug.ru
class: IN
ttl: 90
type: A
ip: 212.193.155.92

Servidores DNS Principal (mname) y Secundario (rname)
host: medkrug.ru
class: IN
ttl: 300
type: SOA
mname: ns1.ngenix-dns.ru
rname: noc.ngenix.net
serial: 1
refresh: 7200
retry: 600
expire: 1209600
minimum-ttl: 300