Apex domains cannot have CNAME records.
Question and response
Question
dig eventex.xyz. NS
Answer
eventex.xyz. 5 NS ns6.afternic.com.
eventex.xyz. 5 NS ns5.afternic.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0