Apex domains cannot have CNAME records.
Question and response
Question
dig banetele-cust.com. NS
Answer
banetele-cust.com. 5 NS dns3.as2116.net.
banetele-cust.com. 5 NS dns2.as2116.net.
banetele-cust.com. 5 NS dns1.as2116.net.
Authority
The response has no authority records.
Additional
dns1.as2116.net. 5 A 193.75.75.1
dns2.as2116.net. 5 A 193.75.75.4
dns3.as2116.net. 5 A 78.46.76.218
dns1.as2116.net. 5 AAAA 2001:8c0:0:0:0:0:0:3
dns2.as2116.net. 5 AAAA 2001:8c0:0:0:0:0:0:4
dns3.as2116.net. 5 AAAA 2a01:4f8:120:32a1:0:0:0:53
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0