smtp.ptech.lu has no NS records.
NS records for this zone are defined at ptech.lu.
NS records for this zone are defined at ptech.lu.
Question and response
Question
dig smtp.ptech.lu. NS
Answer
The response has no answer records.
Authority
ptech.lu. 600 SOA ns3.pt.lu. hostmaster.ns1.pt.lu. 2026021900 10800 3600 2419200 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0