fat.tillo.ch has no CNAME records.
Question and response
Question
dig fat.tillo.ch. NS
Answer
The response has no answer records.
Authority
tillo.ch. 300 SOA fat.tillo.ch. tillo.tillo.ch. 2026030300 10800 3600 300 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0