Apex domains cannot have CNAME records.
Question and response
Question
dig furmanek.info. NS
Answer
furmanek.info. 5 NS ns2.furmanek.info.
furmanek.info. 5 NS ns1.furmanek.info.
Authority
The response has no authority records.
Additional
ns1.furmanek.info. 5 A 185.9.158.35
ns2.furmanek.info. 5 A 185.9.158.42
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0