Apex domains cannot have CNAME records.
Question and response
Question
dig tarman.pl. NS
Answer
tarman.pl. 5 NS mefisto.tarman.pl.
tarman.pl. 5 NS info.tarman.pl.
Authority
The response has no authority records.
Additional
info.tarman.pl. 5 A 217.117.128.3
mefisto.tarman.pl. 5 A 217.117.128.4
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0