Registro IPv4
host: think2020.com
class: IN
ttl: 600
type: A
ip: 156.250.44.90

Servidores DNS Principal (mname) y Secundario (rname)
host: think2020.com
class: IN
ttl: 1800
type: SOA
mname: daisy.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2413536586
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800