Apex domains cannot have CNAME records.
Question and response
Question
dig e-a.com. NS
Answer
e-a.com. 4 NS ns1.binarywarlock.com.
e-a.com. 4 NS ns2.binarywarlock.com.
Authority
The response has no authority records.
Additional
ns1.binarywarlock.com. 4 A 69.16.233.87
ns2.binarywarlock.com. 4 A 69.16.233.87
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0