Apex domains cannot have CNAME records.
Question and response
Question
dig nesteoil.eu. NS
Answer
nesteoil.eu. 5 NS ns6.netnames.net.
nesteoil.eu. 5 NS ns5.netnames.net.
nesteoil.eu. 5 NS ns1.netnames.net.
nesteoil.eu. 5 NS ns2.netnames.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0