Apex domains cannot have CNAME records.
Question and response
Question
dig rootvps.pl. NS
Answer
rootvps.pl. 5 NS dns2.rootvps.pl.
rootvps.pl. 5 NS dns1.rootvps.pl.
Authority
The response has no authority records.
Additional
dns1.rootvps.pl. 5 A 185.242.133.50
dns2.rootvps.pl. 5 A 193.178.43.60
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0