Apex domains cannot have CNAME records.
Question and response
Question
dig f24cim.com. NS
Answer
f24cim.com. 5 NS ns5.itsjefen.no.
f24cim.com. 5 NS ns1.onevoice.no.
f24cim.com. 5 NS ns2.onevoice.no.
f24cim.com. 5 NS ns3.onevoice.no.
Authority
The response has no authority records.
Additional
ns1.onevoice.no. 5 A 185.38.121.11
ns2.onevoice.no. 5 A 185.38.121.12
ns3.onevoice.no. 5 A 151.252.13.149
ns5.itsjefen.no. 5 A 93.89.112.213
ns1.onevoice.no. 5 AAAA 2a04:6fb0:121:0:0:0:0:11
ns2.onevoice.no. 5 AAAA 2a04:6fb0:121:0:0:0:0:12
ns5.itsjefen.no. 5 AAAA 2a02:25e8:1:12:0:0:0:113
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0