Apex domains cannot have CNAME records.
Question and response
Question
dig domain247.fi. NS
Answer
domain247.fi. 5 NS ns1.domain247.fi.
domain247.fi. 5 NS ns2.domain247.fi.
Authority
The response has no authority records.
Additional
ns1.domain247.fi. 5 A 46.246.110.111
ns2.domain247.fi. 5 A 46.246.10.31
ns1.domain247.fi. 5 AAAA 2a02:750:23:111:0:0:0:111
ns2.domain247.fi. 5 AAAA 2a00:1a28:100:0:0:0:0:31
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0