i53871393.versanet.de has no CNAME records.
Question and response
Question
dig i53871393.versanet.de. NS
Answer
The response has no answer records.
Authority
versanet.de. 567 SOA dnsdb.versatel.de. hostmaster.versatel.de. 2025071501 10000 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0