Apex domains cannot have CNAME records.
Question and response
Question
dig epix.net.pl. NS
Answer
epix.net.pl. 5 NS tara.ns.cloudflare.com.
epix.net.pl. 5 NS jason.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0