Apex domains cannot have CNAME records.
Question and response
Question
dig agneau.org. NS
Answer
agneau.org. 5 NS nsth3.agneau.org.
agneau.org. 5 NS whisky.qbbs.fr.
agneau.org. 5 NS nsoracle.agneau.org.
agneau.org. 5 NS ns.agneau.org.
agneau.org. 5 NS oracle.qbbs.fr.
agneau.org. 5 NS ns.sortilege.net.
agneau.org. 5 NS cabale.usenet-fr.net.
agneau.org. 5 NS wazabi.qbbs.fr.
agneau.org. 5 NS ns-slave.free.org.
Authority
The response has no authority records.
Additional
ns.agneau.org. 5 A 213.36.253.69
ns.sortilege.net. 5 A 212.83.129.111
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
whisky.qbbs.fr. 5 A 178.20.49.1
nsoracle.agneau.org. 5 A 141.145.211.20
ns.agneau.org. 5 AAAA 2a01:e0d:1:5:58bf:fa45:0:53
ns.sortilege.net. 5 AAAA 2001:bc8:3107:100:0:0:0:53
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