Apex domains cannot have CNAME records.
Question and response
Question
dig vipower.pl. NS
Answer
vipower.pl. 5 NS ns1.vipower.pl.
vipower.pl. 5 NS ns2.vipower.pl.
Authority
The response has no authority records.
Additional
ns1.vipower.pl. 5 A 185.17.41.25
ns2.vipower.pl. 5 A 178.255.41.10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0