proxy.biosense.rs has no CNAME records.
Question and response
Question
dig proxy.biosense.rs. NS
Answer
The response has no answer records.
Authority
biosense.rs. 925 SOA dns1.eunethosting.com. hostmaster.eunet.co.rs. 2025121505 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0