Apex domains cannot have CNAME records.
Question and response
Question
dig ktc.kz. NS
Answer
ktc.kz. 5 NS ns.ktc.kz.
ktc.kz. 5 NS ns1.ktc.kz.
ktc.kz. 5 NS ns.alm.ktc.kz.
ktc.kz. 5 NS ns.ast.ktc.kz.
Authority
The response has no authority records.
Additional
ns.alm.ktc.kz. 5 A 217.196.30.34
ns.ast.ktc.kz. 5 A 217.196.24.130
ns.ktc.kz. 5 A 217.196.16.146
ns1.ktc.kz. 5 A 217.196.17.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0