ctb01.martinmoerch.dk has no NS records.
NS records for this zone are defined at martinmoerch.dk.
NS records for this zone are defined at martinmoerch.dk.
Question and response
Question
dig ctb01.martinmoerch.dk. NS
Answer
The response has no answer records.
Authority
martinmoerch.dk. 1800 SOA roan.ns.cloudflare.com. dns.cloudflare.com. 2398806827 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0