Apex domains cannot have CNAME records.
Question and response
Question
dig FR.EU.ORG. NS
Answer
FR.EU.ORG. 2 NS DNS.ELM.NET.
FR.EU.ORG. 2 NS NS.ANKH.FR.EU.ORG.
FR.EU.ORG. 2 NS NS1.ERIOMEM.NET.
FR.EU.ORG. 2 NS NS1.EU.ORG.
Authority
The response has no authority records.
Additional
ns1.eu.org. 2 A 45.63.100.187
ns1.eriomem.net. 2 A 136.244.111.41
ns1.eu.org. 2 AAAA 2001:19f0:7402:6b6:5400:1ff:fe9e:d9fe
ns1.eriomem.net. 2 AAAA 2a05:f480:1400:2c3f:5400:4ff:fef4:e48
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0