sprelay.edpnet.net has no CNAME records.
Question and response
Question
dig sprelay.edpnet.net. NS
Answer
The response has no answer records.
Authority
edpnet.net. 600 SOA ns1.edpnet.be. admin.edpnet.net. 2026030200 28800 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0