forum.application.prd.supplyon.com has no CNAME records.
Question and response
Question
dig forum.application.prd.supplyon.com. NS
Answer
The response has no answer records.
Authority
supplyon.com. 272 SOA ns1.cdnetdns.net. dnsadmin.cdnetworks.com. 2022050301 2000 300 181400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0