Registro IPv4
host: tckt4.edu.vn
class: IN
ttl: 3600
type: A
ip: 103.81.84.33

Servidores DNS Principal (mname) y Secundario (rname)
host: tckt4.edu.vn
class: IN
ttl: 3600
type: SOA
mname: 
rname: hostmaster.tckt4.edu.vn
serial: 2018013111
refresh: 3600
retry: 900
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: tckt4.edu.vn
class: IN
ttl: 3600
type: MX
pri: 10
target: mail.tckt4.edu.vn

Información TXT
host: tckt4.edu.vn
class: IN
ttl: 3600
type: TXT
txt: v=spf1 mx a ip4:103.81.84.33 ~all
entries: Array