Apex domains cannot have CNAME records.
Question and response
Question
dig far.fo. NS
Answer
far.fo. 5 NS ns3.xn--kisnavn-p1a.fo.
far.fo. 5 NS ns2.xn--kisnavn-p1a.fo.
far.fo. 5 NS ns1.xn--kisnavn-p1a.fo.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0