Apex domains cannot have CNAME records.
Question and response
Question
dig danskebank.ee. NS
Answer
danskebank.ee. 5 NS magdalena.ns.cloudflare.com.
danskebank.ee. 5 NS cullen.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0