ns.allianz.com has no CNAME records.
Question and response
Question
dig ns.allianz.com. NS
Answer
The response has no answer records.
Authority
allianz.com. 9336 SOA ns.allianz.com. hostmaster.allianz.de. 2026030603 10800 1800 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0