fix26.org is registered in Dave Schweisguth's cheap-domainregistration.com (CDR) account.
fix26.org is registered as a secondary domain in Dave's Google Workspace (GW) account (under Google Admin/Account/Domains/Manage domains). It was verified by generating a string in GW and publishing that string as a DNS TXT record in CDR.
This web site is a Google Site, https://sites.google.com/fix26.org/fix26. It is connected to https://www.fix26.org/ as follows:
Its published site is set to be public (under "Share with others" in the top right of the site editing view).
In CDR, www.fix26.org is a CNAME for ghs.googlehosted.com.
In GW, www.fix26.org is a custom URL for sites.google.com/fix26.org/fix26 (under Google Admin/Apps/Google Workspace/Sites/Custom URL).
In CDR, http://fix26.org/ is forwarded (i.e. HTTP-redirected) to https://www.fix26.org/. Unfortunately https://fix26.org/ is not handled, but browsers treat "fix26.org" as http://fix26.org/, so https://fix26.org/ is not encountered often.