They use a random number, which is sometimes the same as an actual assigned number (yours). I have no idea how they come up with the number. 

Yeah I've had this same thing happen multiple times as well, but years ago, since I no longer answer calls from people I don't know.

They're scamming the caller who called you back. He's the scammee, you're the unfortunate person whose phone number the scammer used to call the scammee.

tech

What Kind Of Attack Is This?

Yeah I've had this same thing happen multiple times as well, but years ago, since I no longer answer calls from people I don't know.

They're scamming the caller who called you back. He's the scammee, you're the unfortunate person whose phone number the scammer used to call the scammee.