Registro IPv4
host: realstudy.kr
class: IN
ttl: 90
type: A
ip: 18.172.213.57

Registro IPv4
host: realstudy.kr
class: IN
ttl: 90
type: A
ip: 18.172.213.100

Registro IPv4
host: realstudy.kr
class: IN
ttl: 90
type: A
ip: 18.172.213.96

Registro IPv4
host: realstudy.kr
class: IN
ttl: 90
type: A
ip: 18.172.213.109

Servidores DNS Principal (mname) y Secundario (rname)
host: realstudy.kr
class: IN
ttl: 21600
type: SOA
mname: ans1.hostcocoa.com
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400