Apex domains cannot have CNAME records.
Question and response
Question
dig usenet-fr.NET. NS
Answer
usenet-fr.net. 5 NS cabale.usenet-fr.net.
usenet-fr.net. 5 NS wazabi6.qbbs.fr.
usenet-fr.net. 5 NS nsoracle.agneau.org.
usenet-fr.net. 5 NS nsth3.agneau.org.
usenet-fr.net. 5 NS oracle.qbbs.fr.
usenet-fr.net. 5 NS wazabi.qbbs.fr.
Authority
The response has no authority records.
Additional
nsth3.agneau.org. 5 A 193.200.43.134
cabale.usenet-fr.net. 5 A 213.36.253.122
oracle.qbbs.fr. 5 A 141.145.206.219
wazabi.qbbs.fr. 5 A 193.28.235.52
nsoracle.agneau.org. 5 A 141.145.211.20
nsth3.agneau.org. 5 AAAA 2001:67c:1740:a0b0:0:0:134:53
cabale.usenet-fr.net. 5 AAAA 2a01:e0d:1:3:58bf:fa7a:0:1
oracle.qbbs.fr. 5 AAAA 2603:c027:c000:507e:2ca1:a569:4d46:9dfe
nsoracle.agneau.org. 5 AAAA 2603:c027:c003:5c00:0:0:0:53
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0