smtp1.turkcell.com.tr has no NS records.
NS records for this zone are defined at turkcell.com.tr.
NS records for this zone are defined at turkcell.com.tr.
Question and response
Question
dig smtp1.turkcell.com.tr. NS
Answer
The response has no answer records.
Authority
turkcell.com.tr. 600 SOA ns1.turkcell.com.tr. hostmaster.turkcell.com.tr. 2026031201 7200 3600 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0