Apex domains cannot have CNAME records.
Question and response
Question
dig anisderute.org. NS
Answer
anisderute.org. 5 NS ns-1461.awsdns-54.org.
anisderute.org. 5 NS ns-1233.awsdns-26.org.
anisderute.org. 5 NS ns-1973.awsdns-54.co.uk.
anisderute.org. 5 NS ns-1704.awsdns-21.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0