Apex domains cannot have CNAME records.
Question and response
Question
dig dns.cy. NS
Answer
dns.cy. 5 NS cynic4.dns.cy.
dns.cy. 5 NS cynic.dns.cy.
dns.cy. 5 NS cynic6.dns.cy.
Authority
The response has no authority records.
Additional
cynic4.dns.cy. 5 A 194.42.29.16
cynic6.dns.cy. 5 A 194.42.29.5
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0