mx.mail.corp.hostcomm.ru has no NS records.
NS records for this zone are defined at corp.hostcomm.ru.
NS records for this zone are defined at corp.hostcomm.ru.
Question and response
Question
dig mx.mail.corp.hostcomm.ru. NS
Answer
The response has no answer records.
Authority
corp.hostcomm.ru. 600 SOA pdns.infra.nic.ru. noc-dns.nic.ru. 2022021002 14400 3600 2592000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0