Registro IPv4
host: cisco.eu
class: IN
ttl: 3600
type: A
ip: 3.33.139.32

Servidores DNS Principal (mname) y Secundario (rname)
host: cisco.eu
class: IN
ttl: 13552
type: SOA
mname: ns1.markmonitor.com
rname: hostmaster.markmonitor.com
serial: 2025022601
refresh: 86400
retry: 3600
expire: 2592000
minimum-ttl: 172800