Apex domains cannot have CNAME records.
Question and response
Question
dig ks-host.com. NS
Answer
ks-host.com. 5 NS ns2.ks-host.com.
ks-host.com. 5 NS ns1.ks-host.com.
ks-host.com. 5 NS ho1.ns.ks.ua.
Authority
The response has no authority records.
Additional
ho1.ns.ks.ua. 5 A 195.47.253.15
ns1.ks-host.com. 5 A 193.29.220.23
ns2.ks-host.com. 5 A 91.200.60.99
ho1.ns.ks.ua. 5 AAAA 2001:67c:258:0:0:0:0:15
ns1.ks-host.com. 5 AAAA 2001:4130:20:0:0:0:0:23
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0