Apex domains cannot have CNAME records.
Question and response
Question
dig kodcu.net. NS
Answer
kodcu.net. 5 NS ns1.kodcu.net.
kodcu.net. 5 NS ns2.kodcu.net.
Authority
The response has no authority records.
Additional
ns1.kodcu.net. 5 A 213.32.17.67
ns2.kodcu.net. 5 A 51.254.149.19
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0