Apex domains cannot have CNAME records.
Question and response
Question
dig liman.net. NS
Answer
liman.net. 5 NS ns.cafax.se.
liman.net. 5 NS ns2.cafax.se.
Authority
The response has no authority records.
Additional
ns.cafax.se. 5 A 192.71.228.17
ns2.cafax.se. 5 A 45.79.143.209
ns.cafax.se. 5 AAAA 2001:6b0:302:0:0:0:0:17
ns2.cafax.se. 5 AAAA 2600:3c03:0:0:f03c:93ff:fe0a:f17c
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0