Apex domains cannot have CNAME records.
Question and response
Question
dig moonhill.fi. NS
Answer
moonhill.fi. 1 NS ns4.moonhill.fi.
moonhill.fi. 1 NS ns6.moonhill.fi.
moonhill.fi. 1 NS ns3.moonhill.fi.
moonhill.fi. 1 NS ns5.moonhill.fi.
Authority
The response has no authority records.
Additional
ns3.moonhill.fi. 1 A 65.108.57.229
ns4.moonhill.fi. 1 A 65.108.242.42
ns5.moonhill.fi. 1 A 65.109.8.221
ns6.moonhill.fi. 1 A 65.21.106.234
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0