mailserver1.altcloud.net.br has no NS records.
NS records for this zone are defined at altcloud.net.br.
NS records for this zone are defined at altcloud.net.br.
Question and response
Question
dig mailserver1.altcloud.net.br. NS
Answer
The response has no answer records.
Authority
altcloud.net.br. 3600 SOA ns1.altcloud.net.br. noc.gegnet.com.br. 2025120301 3600 3600 3600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0