[Tom '74 911]

Recently, I've been getting redirected to this address/page, but only when I visit one specific website (Rennlist). It redirects me from whatever page I am on to this page - see screen shot. I am running Safari on a Mac. Is this a script or something that's on my computer that does the redirect? I don't know enough web tech. to know where to start or if I should be concerned. I haven't seen any other weird behavior on my computer yet and it only happens when I'm on Rennlist... I have run Malwarebytes a few times recently and it says I'm clean. Is this something I should investigate further?

A web search on the phone number listed comes up empty.

Thanks for the help,
Tom