ip.immedion.net has no NS records.
NS records for this zone are defined at immedion.net.
NS records for this zone are defined at immedion.net.
Question and response
Question
dig ip.immedion.net. NS
Answer
The response has no answer records.
Authority
immedion.net. 86400 SOA cp-ns5.immedion.com. hostmaster.immedion.com. 2015072815 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0