how do scam calls generate random phone numbers?

Question

I’ll get a call and sometimes no one even answers me when I pick up and then I will call it back and get the “this # has been disconnected ” response. How does that work?

In: 14

Answer 1

If some one is calling from a system equipped with trunks, there will be a number assigned to outbound calls, and another range for in bound calls. The number is most likely assigned as an outgoing only number.