dns1.commcorp.net.br has no NS records.
NS records for this zone are defined at commcorp.net.br.
NS records for this zone are defined at commcorp.net.br.
Question and response
Question
dig dns1.commcorp.net.br. NS
Answer
The response has no answer records.
Authority
commcorp.net.br. 3600 SOA dns1.commcorp.net.br. postmaster.commcorp.com.br. 2026012758 7200 900 1296000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0