ns2.UGMK-TELECOM.RU has no CNAME records.
Question and response
Question
dig ns2.UGMK-TELECOM.RU. NS
Answer
The response has no answer records.
Authority
UGMK-TELECOM.RU. 3600 SOA ns1.UGMK-TELECOM.RU. vs.UGMK-TELECOM.RU. 2026022501 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0