Apex domains cannot have CNAME records.
Question and response
Question
dig lcom.net.ua. NS
Answer
lcom.net.ua. 5 NS ns1.lcom.net.ua.
lcom.net.ua. 5 NS ns.kumirtele.com.
lcom.net.ua. 5 NS ns2.lcom.net.ua.
Authority
The response has no authority records.
Additional
ns.kumirtele.com. 1 A 91.197.147.49
ns1.lcom.net.ua. 5 A 195.66.136.2
ns2.lcom.net.ua. 5 A 195.66.136.17
ns.kumirtele.com. 1 AAAA 2a0c:6580:0:0:0:0:0:31
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0