Registro IPv4
host: gsdt.kr
class: IN
ttl: 1800
type: A
ip: 1.234.63.114

host: po.gsdt.kr
class: IN
ttl: 1799
type: CNAME
target: gsdt.kr

Servidores DNS Principal (mname) y Secundario (rname)
host: gsdt.kr
class: IN
ttl: 1800
type: SOA
mname: gsdt.kr
rname: postmaster.gsdt.kr
serial: 20171110
refresh: 10800
retry: 3600
expire: 3600000
minimum-ttl: 43200