dev2.test-cdn.GbLNet.ru has no CNAME records.
Question and response
Question
dig dev2.test-cdn.GbLNet.ru. NS
Answer
The response has no answer records.
Authority
test-cdn.GbLNet.RU. 241 SOA ns.GbLNet.RU. vvv.GbLNet.RU. 2025103101 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0