fw.fame.com.br has no NS records.
NS records for this zone are defined at fame.com.br.
NS records for this zone are defined at fame.com.br.
Question and response
Question
dig fw.fame.com.br. NS
Answer
The response has no answer records.
Authority
fame.com.br. 900 SOA a.sec.dns.br. hostmaster.registro.br. 2026057000 86400 900 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0