mx147.ncport.ru has no CNAME records.
Question and response
Question
dig mx147.ncport.ru. NS
Answer
The response has no answer records.
Authority
ncport.ru. 1800 SOA ns1.ncport.ru. postmaster.ncport.ru. 2025072102 1800 900 691200 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0