Apex domains cannot have CNAME records.
Question and response
Question
dig imasoni.com. NS
Answer
imasoni.com. 5 NS ns-1747.awsdns-26.co.uk.
imasoni.com. 5 NS ns-846.awsdns-41.net.
imasoni.com. 5 NS ns-416.awsdns-52.com.
imasoni.com. 5 NS ns-1056.awsdns-04.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0