ns2.sochi.tv has no CNAME records.
Question and response
Question
dig ns2.sochi.tv. NS
Answer
The response has no answer records.
Authority
sochi.tv. 2788 SOA ns1.sochi.tv. root.sochi.tv. 1 38400 10800 259200 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0