Apex domains cannot have CNAME records.
Question and response
Question
dig krenovixa.com. NS
Answer
krenovixa.com. 5 NS ns-1632.awsdns-12.co.uk.
krenovixa.com. 5 NS ns-1277.awsdns-31.org.
krenovixa.com. 5 NS ns-356.awsdns-44.com.
krenovixa.com. 5 NS ns-1372.awsdns-43.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0