Servidores DNS Principal (mname) y Secundario (rname)
host: globalregistrationservices.com
class: IN
ttl: 13871
type: SOA
mname: a1.verisigndns.com
rname: dns.constellix.com
serial: 1556045114
refresh: 43200
retry: 3600
expire: 1209600
minimum-ttl: 180