ns9.ksc.net has no NS records.
NS records for this zone are defined at ksc.net.
NS records for this zone are defined at ksc.net.
Question and response
Question
dig ns9.ksc.net. NS
Answer
The response has no answer records.
Authority
ksc.net. 900 SOA ns1.ksc.net. admin.ns.ksc.co.th. 2021212813 7200 600 2419200 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0