Apex domains cannot have CNAME records.
Question and response
Question
dig renedosiere.org. NS
Answer
renedosiere.org. 5 NS ns-1153.awsdns-16.org.
renedosiere.org. 5 NS ns-573.awsdns-07.net.
renedosiere.org. 5 NS ns-1979.awsdns-55.co.uk.
renedosiere.org. 5 NS ns-1166.awsdns-17.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0