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. 9877 SOA ns1.ttcom.ru. support.tashirtelecom.ru. 2026020202 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0