Apex domains cannot have CNAME records.
Question and response
Question
dig neste.com. NS
Answer
neste.com. 1 NS ns.nesteoil.com.
neste.com. 1 NS ns1.nesteoil.com.
neste.com. 1 NS ns2.nesteoil.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0