muc1.emea.nttdata.com has no CNAME records.
Question and response
Question
dig muc1.emea.nttdata.com. NS
Answer
The response has no answer records.
Authority
emea.nttdata.com. 3114 SOA emea.nttdata.com. hostmaster.gtm-mi01.emea.nttdata.com. 2023062701 3600 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0