rt.lpnet.com.br has no NS records.
NS records for this zone are defined at lpnet.com.br.
NS records for this zone are defined at lpnet.com.br.
Question and response
Question
dig rt.lpnet.com.br. NS
Answer
The response has no answer records.
Authority
lpnet.com.br. 1200 SOA dns1.lpnet.com.br. lpnet.lpnet.com.br. 2024120304 1200 1200 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0