Apex domains cannot have CNAME records.
Question and response
Question
dig spin.ee. NS
Answer
spin.ee. 5 NS ns4.spin.ee.
spin.ee. 5 NS ns3.spin.ee.
Authority
The response has no authority records.
Additional
ns3.spin.ee. 5 A 87.119.171.77
ns4.spin.ee. 5 A 194.204.19.23
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0