Apex domains cannot have CNAME records.
Question and response
Question
dig mpynet.fi. NS
Answer
mpynet.fi. 5 NS ns1.mpynet.fi.
mpynet.fi. 5 NS ns2.mpynet.fi.
mpynet.fi. 5 NS ns3.mpynet.fi.
Authority
The response has no authority records.
Additional
ns1.mpynet.fi. 5 A 82.197.20.12
ns2.mpynet.fi. 5 A 82.197.20.13
ns3.mpynet.fi. 5 A 52.169.78.60
ns1.mpynet.fi. 5 AAAA 2a00:ae00:ff:12:0:0:0:53
ns2.mpynet.fi. 5 AAAA 2a00:ae00:ff:13:0:0:0:53
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0