_acme-challenge.dbk.dk has no NS records.
NS records for this zone are defined at dbk.dk.
NS records for this zone are defined at dbk.dk.
Question and response
Question
dig dbk.dk.kinstavalidation.app. NS
Answer
The response has no answer records.
Authority
kinstavalidation.app. 1800 SOA elliott.ns.cloudflare.com. dns.cloudflare.com. 2398385268 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0