Apex domains cannot have CNAME records.
Question and response
Question
dig eagerreply.com. NS
Answer
eagerreply.com. 5 NS ns1.eagerreply.com.
eagerreply.com. 5 NS ns2.eagerreply.com.
Authority
The response has no authority records.
Additional
ns1.eagerreply.com. 5 A 66.181.45.156
ns2.eagerreply.com. 5 A 104.206.11.107
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0