dizzy.mgmt.koc.net has no CNAME records.
Question and response
Question
dig dizzy.mgmt.koc.net. NS
Answer
The response has no answer records.
Authority
koc.net. 635 SOA dnsa1.vodafone.net.tr. hostmaster.vodafone.net.tr. 2020012072 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0