intern.ispeg.de has no CNAME records.
Question and response
Question
dig intern.ispeg.de. NS
Answer
The response has no answer records.
Authority
ispeg.de. 3413 SOA ns1.ispeg.eu. hostmaster.ispeg.eu. 202312180 86400 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0