f.sec.dns.br has no NS records.
NS records for this zone are defined at dns.br.
NS records for this zone are defined at dns.br.
Question and response
Question
dig f.sec.dns.br. NS
Answer
The response has no answer records.
Authority
dns.br. 86400 SOA a.dns.br. hostmaster.registro.br. 2026022102 86400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0