Apex domains cannot have CNAME records.
Question and response
Question
dig lists.geant.org. NS
Answer
lists.geant.org. 5 NS scsnms.switch.ch.
lists.geant.org. 5 NS ns02.geant.net.
lists.geant.org. 5 NS ns03.geant.net.
lists.geant.org. 5 NS ns1.ja.net.
lists.geant.org. 5 NS ns01.geant.net.
Authority
The response has no authority records.
Additional
ns1.ja.net. 5 A 194.81.227.226
ns01.geant.net. 5 A 62.40.104.250
ns02.geant.net. 5 A 62.40.116.114
ns03.geant.net. 5 A 62.40.116.122
scsnms.switch.ch. 5 A 130.59.31.26
ns1.ja.net. 5 AAAA 2001:630:0:44:0:0:0:e2
scsnms.switch.ch. 5 AAAA 2001:620:0:ff:0:0:0:a7
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0