ns2.ttcom.ru has no CNAME records.
Question and response
Question
dig ns2.ttcom.ru. NS
Answer
The response has no answer records.
Authority
ttcom.RU. 2562 SOA ns1.ttcom.RU. support.tashirtelecom.RU. 2026020202 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0