ns4.kapper.net has no CNAME records.
Question and response
Question
dig ns4.kapper.net. NS
Answer
The response has no answer records.
Authority
kapper.net. 604 SOA ns1.kapper.net. hostmaster.kapper.net. 2024072577 14400 3600 1814400 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0