Apex domains cannot have CNAME records.
Question and response
Question
dig aeosf.com. NS
Answer
aeosf.com. 5 NS ns2.aeosf.com.
aeosf.com. 5 NS ns1.aeosf.com.
Authority
The response has no authority records.
Additional
ns1.aeosf.com. 5 A 216.108.237.9
ns2.aeosf.com. 5 A 216.108.237.61
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0