ui.test-cdn.GBLNET.RU has no CNAME records.
Question and response
Question
dig ui.test-cdn.GBLNET.RU. NS
Answer
The response has no answer records.
Authority
test-cdn.GBLNET.RU. 2491 SOA ns.GBLNET.RU. vvv.GBLNET.RU. 2025103101 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0