Apex domains cannot have CNAME records.
Question and response
Question
dig norlyscustomer.net. NS
Answer
norlyscustomer.net. 4 NS authns02a.42n.dk.
norlyscustomer.net. 4 NS authns02b.42n.dk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0