Registro IPv4
host: knockknock.OR.kr
class: IN
ttl: 73187
type: A
ip: 49.247.7.124

Servidores DNS Principal (mname) y Secundario (rname)
host: knockknock.OR.kr
class: IN
ttl: 8387
type: SOA
mname: ns.gabia.co.kr
rname: hosting.gabia.com
serial: 2020111910
refresh: 1800
retry: 600
expire: 1209600
minimum-ttl: 86400