Apex domains cannot have CNAME records.
Question and response
Question
dig cloudsy.net. NS
Answer
cloudsy.net. 4 NS ns1.cloudsy.net.
cloudsy.net. 4 NS ns2.cloudsy.net.
cloudsy.net. 4 NS ns3.cloudsy.net.
Authority
The response has no authority records.
Additional
ns1.cloudsy.net. 4 A 185.149.68.45
ns2.cloudsy.net. 4 A 185.149.70.74
ns3.cloudsy.net. 4 A 185.149.70.61
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0