Apex domains cannot have CNAME records.
Question and response
Question
dig eu-imimobile.com. NS
Answer
eu-imimobile.com. 5 NS ns-36.awsdns-04.com.
eu-imimobile.com. 5 NS ns-879.awsdns-45.net.
eu-imimobile.com. 5 NS ns-1528.awsdns-63.org.
eu-imimobile.com. 5 NS ns-1890.awsdns-44.co.uk.
Authority
The response has no authority records.
Additional
ns-879.awsdns-45.net. 2 A 205.251.195.111
ns-879.awsdns-45.net. 2 AAAA 2600:9000:5303:6f00:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0