speedtest.highspeed2.net.br has no NS records.
NS records for this zone are defined at highspeed2.net.br.
NS records for this zone are defined at highspeed2.net.br.
Question and response
Question
dig speedtest.highspeed2.net.br. NS
Answer
The response has no answer records.
Authority
highspeed2.net.br. 3600 SOA ns1.highspeed2.net.br. suporte.aprimorar.net.br.highspeed2.net.br. 1633194118 3600 600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0