Registro IPv4
host: Dnsrecords.io
class: IN
ttl: 3600
type: A
ip: 138.197.180.5

Servidores DNS Principal (mname) y Secundario (rname)
host: dnsrecords.io
class: IN
ttl: 1800
type: SOA
mname: ns1.openprovider.nl
rname: dns.openprovider.eu
serial: 2017102601
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600