Apex domains cannot have CNAME records.
Question and response
Question
dig inea.pl. NS
Answer
inea.pl. 5 NS ns1.inea.pl.
inea.pl. 5 NS ns2.inea.pl.
Authority
The response has no authority records.
Additional
ns1.inea.pl. 5 A 46.238.83.5
ns2.inea.pl. 5 A 88.151.136.191
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0