prod-lists02.geant.net has no NS records.
NS records for this zone are defined at geant.net.
NS records for this zone are defined at geant.net.
Question and response
Question
dig prod-lists02.geant.net. NS
Answer
The response has no answer records.
Authority
geant.net. 900 SOA grid01.geant.net. hostmaster.dante.net. 2015081018 3600 7200 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0