I'm sure these calls are just used for senseless fear, & trying to get people to give up info.
I get these calls. Solar Companies have called me loads of times after a goofy beep. I told them we can't get solar, so there is no reason for them to keep calling. I'll post that number.
I got multiple calls from this number and normally there's no voicemail. Last night, one of the falls recorded what sounds like a police scanner/radio in the background . weird