Apex domains cannot have CNAME records.
Question and response
Question
dig erado.com. NS
Answer
erado.com. 4 NS ns6.erado.net.
erado.com. 4 NS ns5.erado.net.
erado.com. 4 NS ns4.erado.net.
erado.com. 4 NS ns1.erado.com.
erado.com. 4 NS ns3.erado.com.
erado.com. 4 NS ns2.erado.com.
Authority
The response has no authority records.
Additional
ns1.erado.com. 4 A 207.195.164.136
ns2.erado.com. 4 A 63.71.10.44
ns3.erado.com. 4 A 199.30.232.44
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0