esms.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 esms.ksc.net. NS
Answer
The response has no answer records.
Authority
ksc.net. 900 SOA ns2.ksc.net. admin.ns.ksc.co.th. 2021212653 7200 600 2419200 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0