Registro IPv4
host: rockron.com
class: IN
ttl: 3600
type: A
ip: 51.161.21.1

Servidores DNS Principal (mname) y Secundario (rname)
host: rockron.com
class: IN
ttl: 3600
type: SOA
mname: ns3.expirationwarning.net
rname: hostmaster.expirationwarning.net
serial: 2026090100
refresh: 7200
retry: 3600
expire: 604800
minimum-ttl: 3600