mx01.vm10.com.br has no NS records.
NS records for this zone are defined at vm10.com.br.
NS records for this zone are defined at vm10.com.br.
Question and response
Question
dig mx01.vm10.com.br. NS
Answer
The response has no answer records.
Authority
vm10.com.br. 3600 SOA ns1.telium.com.br. suporte.telium.com.br. 2026011501 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0