Registro IPv4
host: sncstudy.com
class: IN
ttl: 300
type: A
ip: 222.122.203.12

Servidores DNS Principal (mname) y Secundario (rname)
host: sncstudy.com
class: IN
ttl: 300
type: SOA
mname: ns75.koreadns.kr
rname: hostmaster.koreadns.kr
serial: 2019021315
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 300

Servidor de Correo
host: sncstudy.com
class: IN
ttl: 300
type: MX
pri: 10
target: mail.sncstudy.com