Apex domains cannot have CNAME records.
Question and response
Question
dig idport.kz. NS
Answer
idport.kz. 5 NS cnr2.online.kz.
idport.kz. 5 NS ns.telecom.kz.
idport.kz. 5 NS isp.telecom.kz.
idport.kz. 5 NS cnr1.online.kz.
Authority
The response has no authority records.
Additional
ns.telecom.kz. 5 A 92.46.42.148
isp.telecom.kz. 5 A 82.200.130.227
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0