Registro IPv4
host: kurs4u.ru
class: IN
ttl: 3600
type: A
ip: 91.226.30.3

Servidores DNS Principal (mname) y Secundario (rname)
host: kurs4u.ru
class: IN
ttl: 3600
type: SOA
mname: s.i7.ru
rname: dns.i7.ru
serial: 2014121601
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600