Apex domains cannot have CNAME records.
Question and response
Question
dig twistedbytes.eu. NS
Answer
twistedbytes.eu. 3 NS albert.ns.cloudflare.com.
twistedbytes.eu. 3 NS mary.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0