Servidores DNS Principal (mname) y Secundario (rname)
host: org.ph
class: IN
ttl: 1800
type: SOA
mname: ph-tld-ns.dot.ph
rname: sysadmin.domains.ph
serial: 2026071305
refresh: 21600
retry: 3600
expire: 2592000
minimum-ttl: 3600