Apex domains cannot have CNAME records.
Question and response
Question
dig dataline.ua. NS
Answer
dataline.ua. 5 NS ns.dataline.ua.
dataline.ua. 5 NS ns.secondary.net.ua.
dataline.ua. 5 NS ns2.dataline.ua.
Authority
The response has no authority records.
Additional
ns.dataline.ua. 5 A 193.239.72.10
ns2.dataline.ua. 5 A 193.239.72.138
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0