ns.nvhost.RU has no CNAME records.
Question and response
Question
dig ns.nvhost.RU. NS
Answer
The response has no answer records.
Authority
nvhost.RU. 3136 SOA nvhostnew.RU. root.nvhostnew.RU. 2013113340 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0