Apex domains cannot have CNAME records.
Question and response
Question
dig alkar.net. NS
Answer
alkar.net. 4 NS ns2.vega.com.ua.
alkar.net. 4 NS ns.vegatele.com.
Authority
The response has no authority records.
Additional
ns.vegatele.com. 3 A 195.248.191.70
ns2.vega.com.ua. 3 A 212.9.224.26
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0