Apex domains cannot have CNAME records.
Question and response
Question
dig edoms.biz. NS
Answer
edoms.biz. 4 NS ns2.abovedomains.com.
edoms.biz. 4 NS ns1.abovedomains.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0