Apex domains cannot have CNAME records.
Question and response
Question
dig alfanet.net.ec. NS
Answer
alfanet.net.ec. 5 NS dns1.alfanet.net.ec.
alfanet.net.ec. 5 NS ns2.alfanet.net.ec.
alfanet.net.ec. 5 NS ns1.alfanet.net.ec.
alfanet.net.ec. 5 NS dns2.alfanet.net.ec.
Authority
The response has no authority records.
Additional
dns1.alfanet.net.ec. 5 A 131.108.43.51
dns2.alfanet.net.ec. 5 A 59.153.44.68
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0