isp.24hc.RU has no CNAME records.
Question and response
Question
dig isp.24hc.RU. NS
Answer
The response has no answer records.
Authority
24hc.RU. 40 SOA isp.24hc.RU. info.itcom.info. 2017052253 60 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0