Servidores DNS Principal (mname) y Secundario (rname)
host: waterpointmapper.org
class: IN
ttl: 21600
type: SOA
mname: ns1.ontinuity.co.uk
rname: hostmaster.waterpointmapper.org
serial: 2015041511
refresh: 3600
retry: 600
expire: 1209600
minimum-ttl: 21600