@uwunix In The Before Times, before SNI support allowed multiple certificates to be easily served up on the same IP/port combo (~3-2 years ago) companies that ran content distribution networks and wanted to include TLS for users, but didn't want to buy an IP for every domain, had to bundle a bunch of random domains together into one certificate. Hosting providers may have done the same thing too (but most just didn't support TLS).
a `whois` on the webserver iP might help.