prod-lists02.geant.net has no CNAME records.
Question and response
Question
dig prod-lists02.geant.net. NS
Answer
The response has no answer records.
Authority
geant.net. 219 SOA grid01.geant.net. hostmaster.dante.net. 2015081016 3600 7200 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0