Apex domains cannot have CNAME records.
Question and response
Question
dig qbbs.fr. NS
Answer
qbbs.fr. 5 NS cabale.usenet-fr.net.
qbbs.fr. 5 NS nsoracle.agneau.org.
qbbs.fr. 5 NS wazabi.qbbs.fr.
qbbs.fr. 5 NS whisky.qbbs.fr.
qbbs.fr. 5 NS nsth3.agneau.org.
qbbs.fr. 5 NS oracle.qbbs.fr.
Authority
The response has no authority records.
Additional
oracle.qbbs.fr. 5 A 141.145.206.219
wazabi.qbbs.fr. 5 A 193.28.235.52
whisky.qbbs.fr. 5 A 178.20.49.1
oracle.qbbs.fr. 5 AAAA 2603:c027:c000:507e:2ca1:a569:4d46:9dfe
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0