dns.pipenitro.com has no NS records.
NS records for this zone are defined at pipenitro.com.
NS records for this zone are defined at pipenitro.com.
Question and response
Question
dig dns.pipenitro.com. NS
Answer
The response has no answer records.
Authority
pipenitro.com. 3600 SOA dns.pipenitro.com. hostmaster.pipenitro.com. 1163899234 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0