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