Apex domains cannot have CNAME records.
Question and response
Question
dig ariane.network. NS
Answer
ariane.network. 5 NS dumas.e-tera.com.
ariane.network. 5 NS daudet.e-tera.com.
Authority
The response has no authority records.
Additional
dumas.e-tera.com. 5 A 195.49.132.1
daudet.e-tera.com. 5 A 195.49.132.193
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0