Apex domains cannot have CNAME records.
Question and response
Question
dig agamm.org. NS
Answer
agamm.org. 5 NS ns-1782.awsdns-30.co.uk.
agamm.org. 5 NS ns-1476.awsdns-56.org.
agamm.org. 5 NS ns-493.awsdns-61.com.
agamm.org. 5 NS ns-1238.awsdns-26.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0