[rock58seg]

They used sequential dialers. They automaticaly dial next number higher, that way all numbers were dialed whether listed or not.

[TexasCajun]

They used sequential dialers. They automaticaly dial next number higher, that way all numbers were dialed whether listed or not.

There is a product called the "Zapper" and it works on these computer generated calls. I have it and it works. It tricks the calling computer with a signal that indicates the number dialed is disconnect, no more calls from that computer.