mail.itatelecom.com.br has no NS records.
NS records for this zone are defined at itatelecom.com.br.
NS records for this zone are defined at itatelecom.com.br.
Question and response
Question
dig mail.itatelecom.com.br. NS
Answer
The response has no answer records.
Authority
itatelecom.com.br. 300 SOA ns1.itatelecom.com.br. hostmaster.itatelecom.com.br. 2024052574 10800 3600 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0