Registro IPv4
host: sparrow.cloudflare.com
class: IN
ttl: 300
type: A
ip: 104.18.2.57

Registro IPv4
host: sparrow.cloudflare.com
class: IN
ttl: 300
type: A
ip: 104.18.3.57

Servidores DNS Principal (mname) y Secundario (rname)
host: sparrow.cloudflare.com
class: IN
ttl: 1800
type: SOA
mname: bella.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2418455770
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800