Apex domains cannot have CNAME records.
Question and response
Question
dig it.sikt.no. NS
Answer
it.sikt.no. 5 NS ns-1026.awsdns-00.org.
it.sikt.no. 5 NS ns-371.awsdns-46.com.
it.sikt.no. 5 NS ns-526.awsdns-01.net.
it.sikt.no. 5 NS ns-1878.awsdns-42.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0