ns.alterna.com.br has no NS records.
NS records for this zone are defined at alterna.com.br.
NS records for this zone are defined at alterna.com.br.
Question and response
Question
dig ns.alterna.com.br. NS
Answer
The response has no answer records.
Authority
alterna.com.br. 3600 SOA ns.alterna.com.br. root\@ns.alterna.com.br. 2025101301 3600 600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0