Apex domains cannot have CNAME records.
Question and response
Question
dig panelplus.pl. NS
Answer
panelplus.pl. 5 NS dns2.panelplus.pl.
panelplus.pl. 5 NS dns1.panelplus.pl.
Authority
The response has no authority records.
Additional
dns1.panelplus.pl. 5 A 195.225.76.130
dns2.panelplus.pl. 5 A 136.244.101.152
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0