I googled one once after it left an obvious scam voicemail which led me to the virtual phone number providers site. I looked at reporting it on the FCCs website, but reporting there is a PIA. You have to fill out a big form to create a report. The virtual number providers site had it’s own report page which took 2 seconds to fill out. Later that day I got an email saying they take it seriously, it’s a Google voice number or something and they’re opening an investigation. The next day I get an email saying they concluded their investigation and the number was disconnected and the account terminated. It was kinda satisfying, though I doubt it impacted the scammer much.
This works for some sites, but honestly it’s easier using the Firefox reading mode on those sites, it basically does the same thing. It only works if the page loads the full articles text behind the pay wall popup which unfortunately not many do.