Apex domains cannot have CNAME records.
Question and response
Question
dig fiber.ee. NS
Answer
fiber.ee. 4 NS ns2.compic.ee.
fiber.ee. 4 NS ns.compic.ee.
Authority
The response has no authority records.
Additional
ns.compic.ee. 4 A 188.92.160.2
ns2.compic.ee. 4 A 92.62.96.228
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0