Apex domains cannot have CNAME records.
Question and response
Question
dig services-immo.com. NS
Answer
services-immo.com. 2 NS ns2.services-immo.com.
services-immo.com. 2 NS ns1.services-immo.com.
Authority
The response has no authority records.
Additional
ns1.services-immo.com. 2 A 139.99.68.215
ns2.services-immo.com. 2 A 51.79.234.125
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0