mail2.infinitynt.com.br has no NS records.
NS records for this zone are defined at infinitynt.com.br.
NS records for this zone are defined at infinitynt.com.br.
Question and response
Question
dig mail2.infinitynt.com.br. NS
Answer
The response has no answer records.
Authority
infinitynt.com.br. 86400 SOA ns134.prodns.com.br. root.srv134.prodns.com.br. 2026020504 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0