Registro IPv4
host: fil.pt
class: IN
ttl: 3600
type: A
ip: 37.48.87.73

Servidores DNS Principal (mname) y Secundario (rname)
host: fil.pt
class: IN
ttl: 3600
type: SOA
mname: ns3.fil.pt
rname: hostmaster.ccl\.fil.pt
serial: 2019082341
refresh: 14400
retry: 3600
expire: 604800
minimum-ttl: 3600