ipa02.ams02.cldin.eu has no CNAME records.
Question and response
Question
dig ipa02.ams02.cldin.eu. NS
Answer
The response has no answer records.
Authority
cldin.eu. 180 SOA ns1.cldin.eu. hostmaster.cldin.eu. 1772442146 3600 900 1209600 180
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0