Apex domains cannot have CNAME records.
Question and response
Question
dig cibonet.com. NS
Answer
cibonet.com. 2 NS dns1.cibonet.com.
cibonet.com. 2 NS dns2.cibonet.com.
Authority
The response has no authority records.
Additional
dns1.cibonet.com. 3 A 210.5.1.234
dns2.cibonet.com. 2 A 218.97.46.222
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0