mx-avas.mvmnet.com has no NS records.
NS records for this zone are defined at mvmnet.com.
NS records for this zone are defined at mvmnet.com.
Question and response
Question
dig mx-avas.mvmnet.com. NS
Answer
The response has no answer records.
Authority
mvmnet.com. 86400 SOA ns1.mvmnet.com. abuse.mvmnet.com. 2025053204 3600 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0