Apex domains cannot have CNAME records.
Question and response
Question
dig epbinternet.com. NS
Answer
epbinternet.com. 5 NS ns1.epbinternet.net.
epbinternet.com. 5 NS ns2.epbinternet.net.
Authority
The response has no authority records.
Additional
ns1.epbinternet.net. 5 A 74.205.143.2
ns2.epbinternet.net. 5 A 66.18.63.50
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0