Apex domains cannot have CNAME records.
Question and response
Question
dig vc.org.ua. NS
Answer
vc.org.ua. 5 NS ns.secondary.net.ua.
vc.org.ua. 5 NS ns.academ.kiev.ua.
vc.org.ua. 5 NS ns.vc.org.ua.
Authority
The response has no authority records.
Additional
ns.vc.org.ua. 5 A 152.67.83.197
ns.academ.kiev.ua. 5 A 194.143.145.237
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0