Apex domains cannot have CNAME records.
Question and response
Question
dig romaba.com. NS
Answer
romaba.com. 3 NS ns-1096.awsdns-09.org.
romaba.com. 3 NS ns-403.awsdns-50.com.
romaba.com. 3 NS ns-302.awsdns-37.com.
romaba.com. 3 NS ns-1653.awsdns-14.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0