srvmailbrm01.corp.wznet.com.br has no NS records.
NS records for this zone are defined at corp.wznet.com.br.
NS records for this zone are defined at corp.wznet.com.br.
Question and response
Question
dig srvmailbrm01.corp.wznet.com.br. NS
Answer
The response has no answer records.
Authority
corp.wznet.com.br. 38400 SOA dns-aut-01.corp.wznet.com.br. cgr.wznet.com.br. 2026031600 300 3600 3600 38400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0