Apex domains cannot have CNAME records.
Question and response
Question
dig super-host.pl. NS
Answer
super-host.pl. 5 NS ns3.ogicom.pl.
super-host.pl. 5 NS ns2.ogicom.pl.
super-host.pl. 5 NS ns1.ogicom.pl.
Authority
The response has no authority records.
Additional
ns1.ogicom.pl. 5 A 94.152.255.103
ns2.ogicom.pl. 5 A 94.152.254.103
ns3.ogicom.pl. 5 A 94.152.254.153
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0