Registro IPv4
host: 3km.co.kr
class: IN
ttl: 1800
type: A
ip: 112.175.31.179

Servidores DNS Principal (mname) y Secundario (rname)
host: 3km.co.kr
class: IN
ttl: 1800
type: SOA
mname: 3km.co.kr
rname: postmaster.3km.co.kr
serial: 20180106
refresh: 10800
retry: 3600
expire: 3600000
minimum-ttl: 43200