Apex domains cannot have CNAME records.
Question and response
Question
dig online.kz. NS
Answer
online.kz. 5 NS cnr2.online.kz.
online.kz. 5 NS cnr1.online.kz.
Authority
The response has no authority records.
Additional
cnr1.online.kz. 5 A 92.46.38.183
cnr2.online.kz. 5 A 92.46.38.184
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0