Apex domains cannot have CNAME records.
Question and response
Question
dig eqol.rs. NS
Answer
eqol.rs. 5 NS ns2.ulimitserver.com.
eqol.rs. 5 NS ns1.ulimitserver.com.
Authority
The response has no authority records.
Additional
ns1.ulimitserver.com. 5 A 178.218.172.170
ns2.ulimitserver.com. 5 A 178.218.175.175
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0