dns1.st1internet.com.br has no NS records.
NS records for this zone are defined at st1internet.com.br.
NS records for this zone are defined at st1internet.com.br.
Question and response
Question
dig dns1.st1internet.com.br. NS
Answer
The response has no answer records.
Authority
st1internet.com.br. 300 SOA dns1.st1internet.com.br. noc.st1.net.br. 2026030606 3600 600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0