Apex domains cannot have CNAME records.
Question and response
Question
dig linecarrier.fi. NS
Answer
linecarrier.fi. 5 NS pns34.cloudns.net.
linecarrier.fi. 5 NS pns31.cloudns.net.
linecarrier.fi. 5 NS pns32.cloudns.net.
linecarrier.fi. 5 NS pns33.cloudns.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0