test-domain-sf.oi.com.br has no NS records.
NS records for this zone are defined at oi.com.br.
NS records for this zone are defined at oi.com.br.
Question and response
Question
dig test-domain-sf.oi.com.br.00d3h000006f2dceai.live.siteforce.com. NS
Answer
The response has no answer records.
Authority
live.siteforce.com. 10 SOA dns01.salesforce.com. hostmaster.salesforce.com. 2018043227 600 900 2592000 10
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0