Apex domains cannot have CNAME records.
Question and response
Question
dig hostaan.com. NS
Answer
hostaan.com. 5 NS ns.hostaan.fi.
hostaan.com. 5 NS ns.hostaan.com.
Authority
The response has no authority records.
Additional
ns.hostaan.fi. 5 A 185.26.51.39
ns.hostaan.com. 5 A 94.237.26.143
ns.hostaan.fi. 5 AAAA 2a04:3540:1000:310:54b9:a2ff:fe8e:559f
ns.hostaan.com. 5 AAAA 2a04:3542:1000:910:54b9:a2ff:fe8e:587c
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0