Apex domains cannot have CNAME records.
Question and response
Question
dig fensolutions.com. NS
Answer
fensolutions.com. 5 NS ns1182.dns.dyn.com.
fensolutions.com. 5 NS ns4174.dns.dyn.com.
fensolutions.com. 5 NS ns3177.dns.dyn.com.
fensolutions.com. 5 NS ns2139.dns.dyn.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0