Apex domains cannot have CNAME records.
Question and response
Question
dig iqimport.ch. NS
Answer
iqimport.ch. 5 NS ns32.infomaniak.com.
iqimport.ch. 5 NS ns31.infomaniak.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0