dns2.dcnet.com.tr has no NS records.
NS records for this zone are defined at com.tr.
NS records for this zone are defined at com.tr.
Question and response
Question
dig dns2.dcnet.com.tr. NS
Answer
The response has no answer records.
Authority
dcnet.com.tr. 2997 SOA dns1.dc.net.tr. hostmaster.dcnet.com.tr. 2026020501 3600 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0