Apex domains cannot have CNAME records.
Question and response
Question
dig creoline.com. NS
Answer
creoline.com. 5 NS ns3.creoline.net.
creoline.com. 5 NS ns1.creoline.net.
creoline.com. 5 NS ns2.creoline.net.
creoline.com. 5 NS ns4.creoline.net.
Authority
The response has no authority records.
Additional
ns1.creoline.net. 3 A 185.136.96.184
ns2.creoline.net. 3 A 185.136.97.184
ns3.creoline.net. 3 A 185.136.98.184
ns4.creoline.net. 3 A 185.136.99.184
ns1.creoline.net. 3 AAAA 2a06:fb00:1:0:0:0:1:184
ns2.creoline.net. 3 AAAA 2a06:fb00:1:0:0:0:2:184
ns3.creoline.net. 3 AAAA 2a06:fb00:1:0:0:0:3:184
ns4.creoline.net. 3 AAAA 2a06:fb00:1:0:0:0:4:184
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0