Apex domains cannot have CNAME records.
Question and response
Question
dig verkkoselvitys.fi. NS
Answer
verkkoselvitys.fi. 5 NS zoner.g1-dns.one.
verkkoselvitys.fi. 5 NS zoner.g1-dns.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0