Apex domains cannot have CNAME records.
Question and response
Question
dig tester.kz. NS
Answer
tester.kz. 5 NS ns3.hoster.kz.
tester.kz. 5 NS ns1.hoster.kz.
tester.kz. 5 NS ns2.hoster.kz.
Authority
The response has no authority records.
Additional
ns1.hoster.kz. 5 A 185.116.195.38
ns2.hoster.kz. 5 A 185.121.81.104
ns3.hoster.kz. 5 A 89.35.125.31
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0