Apex domains cannot have CNAME records.
Question and response
Question
dig yuvox.net. NS
Answer
yuvox.net. 4 NS dns.yuvox.net.
yuvox.net. 4 NS dns2.yuvox.net.
Authority
The response has no authority records.
Additional
dns.yuvox.net. 4 A 201.130.0.3
dns2.yuvox.net. 4 A 201.130.0.4
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0