Apex domains cannot have CNAME records.
Question and response
Question
dig robotikbank.com. NS
Answer
robotikbank.com. 4 NS ns-1396.awsdns-46.org.
robotikbank.com. 4 NS ns-1207.awsdns-22.org.
robotikbank.com. 4 NS ns-1161.awsdns-17.org.
robotikbank.com. 4 NS ns-1776.awsdns-30.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0