Apex domains cannot have CNAME records.
Question and response
Question
dig fnop.net. NS
Answer
fnop.net. 5 NS 3-get.njalla.fo.
fnop.net. 5 NS 1-you.njalla.no.
fnop.net. 5 NS 2-can.njalla.in.
Authority
The response has no authority records.
Additional
1-you.njalla.no. 5 A 185.193.124.2
3-get.njalla.fo. 5 A 95.215.19.5
1-you.njalla.no. 5 AAAA 2001:67c:235c:0:0:0:0:2
3-get.njalla.fo. 5 AAAA 2001:67c:2354:2:0:0:0:5
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0