Registro IPv4
host: nexbook.co.kr
class: IN
ttl: 600
type: A
ip: 115.68.59.90

Servidores DNS Principal (mname) y Secundario (rname)
host: nexbook.co.kr
class: IN
ttl: 86400
type: SOA
mname: ns1.kr
rname: admin.ns1.kr
serial: 2018070301
refresh: 21600
retry: 3600
expire: 1209600
minimum-ttl: 600

Servidor de Correo
host: nexbook.co.kr
class: IN
ttl: 600
type: MX
pri: 10
target: mail.nexbook.co.kr

Información TXT
host: nexbook.co.kr
class: IN
ttl: 600
type: TXT
txt: v=spf1 ip4:115.68.59.90 ~all
entries: Array