ans3.ewetel.net has no CNAME records.
Question and response
Question
dig ans3.ewetel.net. NS
Answer
The response has no answer records.
Authority
ewetel.net. 68097 SOA ans0.ewetel.de. hostmaster.ewetel.de. 2025201032 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0