buzz.esoo.ru has no CNAME records.
Question and response
Question
dig buzz.esoo.ru. NS
Answer
The response has no answer records.
Authority
esoo.ru. 6115 SOA ns1.esoo.ru. hostmaster.esoo.ru. 2025111800 43200 7200 360000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0