Apex domains cannot have CNAME records.
Question and response
Question
dig hostido.pl. NS
Answer
hostido.pl. 5 NS ns3.hostido.net.pl.
hostido.pl. 5 NS ns1.hostido.net.pl.
hostido.pl. 5 NS ns2.hostido.net.pl.
Authority
The response has no authority records.
Additional
ns1.hostido.net.pl. 5 A 185.110.51.16
ns2.hostido.net.pl. 5 A 46.248.165.23
ns3.hostido.net.pl. 5 A 178.162.240.114
ns1.hostido.net.pl. 5 AAAA 2a01:7400:1:1691:0:1:16:1
ns3.hostido.net.pl. 5 AAAA 2a00:c98:400f:109:1c00:46ff:fe00:908
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0