Registro IPv4
host: 21cl.net
class: IN
ttl: 600
type: A
ip: 8.134.50.91

Servidores DNS Principal (mname) y Secundario (rname)
host: 21cl.net
class: IN
ttl: 180
type: SOA
mname: f1g1ns1.dnspod.net
rname: freednsadmin.dnspod.com
serial: 1672191484
refresh: 3600
retry: 180
expire: 1209600
minimum-ttl: 180