Registro IPv4
host: duoservers.com
class: IN
ttl: 3600
type: A
ip: 198.23.53.73

Servidores DNS Principal (mname) y Secundario (rname)
host: duoservers.com
class: IN
ttl: 2560
type: SOA
mname: dns1.duoservers.com
rname: hostmaster.duoservers.com
serial: 1750046705
refresh: 16384
retry: 2048
expire: 1048576
minimum-ttl: 2560

Servidor de Correo
host: duoservers.com
class: IN
ttl: 21600
type: MX
pri: 10
target: mx.duoservers.com

Información TXT
host: duoservers.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 a mx a: ip4:198.23.53.5/32
entries: Array