Apex domains cannot have CNAME records.
Question and response
Question
dig rajaolympus.net. NS
Answer
rajaolympus.net. 1 NS ns-1854.awsdns-39.co.uk.
rajaolympus.net. 1 NS ns-263.awsdns-32.com.
rajaolympus.net. 1 NS ns-1205.awsdns-22.org.
rajaolympus.net. 1 NS ns-1953.awsdns-52.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0