Apex domains cannot have CNAME records.
Question and response
Question
dig radiomaria.org.ua. NS
Answer
radiomaria.org.ua. 5 NS park2.tuthost.com.
radiomaria.org.ua. 5 NS park1.tuthost.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0