Apex domains cannot have CNAME records.
Question and response
Question
dig besthosting.ua. NS
Answer
besthosting.ua. 3 NS ns2.besthosting.com.ua.
besthosting.ua. 3 NS ns1.besthosting.com.ua.
Authority
The response has no authority records.
Additional
ns1.besthosting.com.ua. 3 A 195.248.234.5
ns2.besthosting.com.ua. 3 A 195.248.235.5
ns1.besthosting.com.ua. 3 AAAA 2001:67c:2224:100:195:248:234:5
ns2.besthosting.com.ua. 3 AAAA 2001:67c:2224:100:195:248:235:5
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0