electro.schalk-it.de has no CNAME records.
Question and response
Question
dig electro.schalk-it.de. NS
Answer
The response has no answer records.
Authority
schalk-it.de. 3461 SOA ns1.schalk-it.de. domain-support.schalk-and-friends.de. 2025120414 43200 7200 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0