spam4.provisiondata.net has no CNAME records.
Question and response
Question
dig spam4.provisiondata.net. NS
Answer
The response has no answer records.
Authority
provisiondata.net. 165 SOA pdns1.provisiondata.net. hostmaster.provisiondata.net. 2022051002 1800 600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0