mail.cctld.uz has no CNAME records.
Question and response
Question
dig mail.cctld.uz. NS
Answer
The response has no answer records.
Authority
cctld.uz. 600 SOA ns.uz. hostmaster.cctld.uz. 2025091987 600 600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0