Apex domains cannot have CNAME records.
Question and response
Question
dig ukrhub.net. NS
Answer
ukrhub.net. 5 NS ns190.ukrhub.net.
ukrhub.net. 5 NS ns94.ukrhub.net.
Authority
The response has no authority records.
Additional
ns94.ukrhub.net. 5 A 94.125.121.42
ns190.ukrhub.net. 5 A 212.90.190.2
ns94.ukrhub.net. 5 AAAA 2a04:42c0:2:2:0:0:0:2
ns190.ukrhub.net. 5 AAAA 2a04:42c0:2:4:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0