EXCH19EDGE-OP01.tue.nl has no NS records.
NS records for this zone are defined at tue.nl.
NS records for this zone are defined at tue.nl.
Question and response
Question
dig EXCH19EDGE-OP01.tue.nl. NS
Answer
The response has no answer records.
Authority
tue.nl. 900 SOA ipam.tue.nl. hostmaster.tue.nl. 37925 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0