Apex domains cannot have CNAME records.
Question and response
Question
dig loopia.se. NS
Answer
loopia.se. 5 NS ns1.loopia.se.
loopia.se. 5 NS ns2.loopia.se.
Authority
The response has no authority records.
Additional
ns1.loopia.se. 5 A 93.188.0.20
ns2.loopia.se. 5 A 185.71.156.20
ns1.loopia.se. 5 AAAA 2a02:250:ffff:0:0:0:0:20
ns2.loopia.se. 5 AAAA 2a02:250:fffe:0:0:0:0:20
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0