cgp.base64.com.br has no NS records.
NS records for this zone are defined at base64.com.br.
NS records for this zone are defined at base64.com.br.
Question and response
Question
dig cgp.base64.com.br. NS
Answer
The response has no answer records.
Authority
base64.com.br. 1800 SOA ezra.ns.cloudflare.com. dns.cloudflare.com. 2395982483 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0