oi.webnavegador.com.br has no NS records.
NS records for this zone are defined at webnavegador.com.br.
NS records for this zone are defined at webnavegador.com.br.
Question and response
Question
dig ips.dnstool.site. NS
Answer
The response has no answer records.
Authority
dnstool.site. 1800 SOA betty.ns.cloudflare.com. dns.cloudflare.com. 2399698431 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0