nserver2.eurobyte.ru has no CNAME records.
Question and response
Question
dig nserver2.eurobyte.ru. NS
Answer
The response has no answer records.
Authority
eurobyte.RU. 1872 SOA dns1.eurobyte.RU. info.eurobyte.RU. 2018101201 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0