mx3.lew.de has no NS records.
NS records for this zone are defined at lew.de.
NS records for this zone are defined at lew.de.
Question and response
Question
dig mx3.lew.de. NS
Answer
The response has no answer records.
Authority
lew.de. 86400 SOA ns1.lewtelnet.de. hostmaster.lewtelnet.de. 2026022706 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0