syslog.24HC.RU has no CNAME records.
Question and response
Question
dig syslog.24HC.RU. NS
Answer
The response has no answer records.
Authority
24HC.RU. 52 SOA isp.24HC.RU. info.itcom.info. 2017052253 60 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0