It may be from my previous host, for which CF keeps sending me “discovery” emails but they are no longer my host as they closed down this year … perhaps bytehost is who they sold their domain name to? CF has been sending me periodic emails for subdomains I had on that host but no longer have on the new host. Here’s an example of past host that CF has discovered yet I have not been with NetworkRedux since they closed in Dec 2020.
Cloudflare has observed issuance of the following certificate for dwdc.net or one of its subdomains:
Log date: 2021-04-15 20:43:19 UTC
Issuer: CN=R3,O=Let’s Encrypt,C=US
Validity: 2021-04-15 19:43:19 UTC - 2021-07-14 19:43:19 UTC
DNS Names: xxxxxx.dwdc.net
(xxxx’s used to replace subdomain since it no longer exists)