Apex domains cannot have CNAME records.
Question and response
Question
dig nordext.net. NS
Answer
nordext.net. 4 NS dns2.inasset.net.
nordext.net. 4 NS dns1.inasset.net.
nordext.net. 4 NS dns3.inasset.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0