Registro IPv4
host: mb5u.com
class: IN
ttl: 100
type: A
ip: 8.217.220.211

Servidores DNS Principal (mname) y Secundario (rname)
host: mb5u.com
class: IN
ttl: 600
type: SOA
mname: ns1.julydns.com
rname: master.jmdns.com
serial: 1762273178
refresh: 3600
retry: 1200
expire: 86400
minimum-ttl: 600