c2.dns.sa has no NS records.
NS records for this zone are defined at dns.sa.
NS records for this zone are defined at dns.sa.
Question and response
Question
dig c2.dns.sa. NS
Answer
The response has no answer records.
Authority
dns.sa. 3600 SOA ns1.nic.sa. hostmaster.nic.sa. 2026022602 10800 3600 3600000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0