mx2.spxs.net has no NS records.
NS records for this zone are defined at spxs.net.
NS records for this zone are defined at spxs.net.
Question and response
Question
dig mx2.spxs.net. NS
Answer
The response has no answer records.
Authority
spxs.net. 3600 SOA ns1.scan-plus.com. hostmaster.scanplus.de. 2026020401 86400 7200 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0