Registro IPv4
host: isertel.com
class: IN
ttl: 7200
type: A
ip: 181.39.34.132

Servidores DNS Principal (mname) y Secundario (rname)
host: isertel.com
class: IN
ttl: 7200
type: SOA
mname: NS1.DOTSTER.com
rname: namehost\@WORLDNIC.com
serial: 124050911
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: isertel.com
class: IN
ttl: 3600
type: MX
pri: 30
target: correo.isertel.com

Información TXT
host: isertel.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 ip4:186.4.216.226/24 ?all
entries: Array

Información TXT
host: isertel.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 a ip4:186.4.216.226/24 a:correo.isertel.com ~all
entries: Array