dc241.108.alphaservers.com.br has no NS records.
NS records for this zone are defined at alphaservers.com.br.
NS records for this zone are defined at alphaservers.com.br.
Question and response
Question
dig dc241.108.alphaservers.com.br. NS
Answer
The response has no answer records.
Authority
alphaservers.com.br. 1800 SOA austin.ns.cloudflare.com. dns.cloudflare.com. 2398647143 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0