ns6.cj2.nl has no NS records.
NS records for this zone are defined at cj2.nl.
NS records for this zone are defined at cj2.nl.
Question and response
Question
dig ns6.cj2.nl. NS
Answer
The response has no answer records.
Authority
cj2.nl. 3600 SOA ns5.cj2.nl. hostmaster.cj2.nl. 39 1800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0