Registro IPv4
host: sos.xxx
class: IN
ttl: 300
type: A
ip: 78.140.176.90

Servidores DNS Principal (mname) y Secundario (rname)
host: sos.xxx
class: IN
ttl: 1800
type: SOA
mname: cass.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2418951894
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800