Apex domains cannot have CNAME records.
Question and response
Question
dig hideu.net. NS
Answer
hideu.net. 3 NS ns-866.awsdns-44.net.
hideu.net. 3 NS ns-895.awsdns-47.net.
hideu.net. 3 NS ns-733.awsdns-27.net.
hideu.net. 3 NS ns-801.awsdns-36.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0