Apex domains cannot have CNAME records.
Question and response
Question
dig 301-moved.eu. NS
Answer
301-moved.eu. 5 NS ns1.first-ns.de.
301-moved.eu. 5 NS robotns3.second-ns.com.
301-moved.eu. 5 NS robotns2.second-ns.de.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0