d2.mchost.RU has no CNAME records.
Question and response
Question
dig d2.mchost.RU. NS
Answer
The response has no answer records.
Authority
MCHOST.RU. 3302 SOA ns1.ihc.RU. info.ihc.RU. 2019101001 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0