Registro CNAME (Alias)
host: ltechkorea.com
class: IN
ttl: 1800
type: CNAME
target: com

Servidores DNS Principal (mname) y Secundario (rname)
host: com
class: IN
ttl: 900
type: SOA
mname: a.gtld-servers.net
rname: nstld.verisign-grs.com
serial: 1789195413
refresh: 1800
retry: 900
expire: 604800
minimum-ttl: 900

Registro CNAME (Alias)
host: ltechkorea.com
class: IN
ttl: 1800
type: CNAME
target: com