customerdns003.redcloud.ch has no CNAME records.
Question and response
Question
dig customerdns003.redcloud.ch. NS
Answer
The response has no answer records.
Authority
redcloud.ch. 3588 SOA customerdns001.redcloud.ch. administrator.redcloud.ch. 2026011321 86400 7200 3600000 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0