exchange.ktree.com.br has no NS records.
NS records for this zone are defined at ktree.com.br.
NS records for this zone are defined at ktree.com.br.
Question and response
Question
dig exchange.ktree.com.br. NS
Answer
The response has no answer records.
Authority
ktree.com.br. 1200 SOA ns1.penso.com.br. hostmaster.penso.com.br.ktree.com.br. 2026021301 7200 7200 172800 1200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0