ns1.srv.in.th has no NS records.
NS records for this zone are defined at srv.in.th.
NS records for this zone are defined at srv.in.th.
Question and response
Question
dig ns1.srv.in.th. NS
Answer
The response has no answer records.
Authority
srv.in.th. 1800 SOA jill.ns.cloudflare.com. dns.cloudflare.com. 2398596650 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0