Apex domains cannot have CNAME records.
Question and response
Question
dig dyn.liman.net. NS
Answer
dyn.liman.net. 5 NS ns.cafax.se.
Authority
The response has no authority records.
Additional
ns.cafax.se. 5 A 192.71.228.17
ns.cafax.se. 5 AAAA 2001:6b0:302:0:0:0:0:17
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0