web171.weingaertner-it.de has no CNAME records.
Question and response
Question
dig web171.weingaertner-it.de. NS
Answer
The response has no answer records.
Authority
weingaertner-it.de. 900 SOA dns10.weingaertner-it.de. markus.weingaertner-it.de. 2026021661 7200 1800 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0