Apex domains cannot have CNAME records.
Question and response
Question
dig cybersecurityeurope.org. NS
Answer
cybersecurityeurope.org. 5 NS ns1stv.name.com.
cybersecurityeurope.org. 5 NS ns2kqz.name.com.
cybersecurityeurope.org. 5 NS ns3jnr.name.com.
cybersecurityeurope.org. 5 NS ns4kpx.name.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0