mx3.teccloud.com.br has no NS records.
NS records for this zone are defined at teccloud.com.br.
NS records for this zone are defined at teccloud.com.br.
Question and response
Question
dig mx3.teccloud.com.br. NS
Answer
The response has no answer records.
Authority
teccloud.com.br. 3600 SOA ns2.teccloud.com. dominios.teccloud.com.br. 2024082601 10800 3600 2419200 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0