ns4.uz has no CNAME records.
Question and response
Question
dig ns4.uz. NS
Answer
The response has no answer records.
Authority
uz. 1234 SOA ns.uz. hostmaster.cctld.uz. 2026071410 3600 900 5184000 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0