Apex domains cannot have CNAME records.
Question and response
Question
dig support-binan.com. NS
Answer
support-binan.com. 5 NS ns1.support-binan.com.
support-binan.com. 5 NS ns2.support-binan.com.
Authority
The response has no authority records.
Additional
ns1.support-binan.com. 5 A 192.227.122.137
ns2.support-binan.com. 5 A 192.227.122.138
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0