I am at work, I cannot be accepting calls while at work, I did not answer it, I called it back on my break and it was " the number is not in service "this is really bothering me. If it was a fax calling, wouldn't it have handshake or fax sounds. ?

Called the home and when answered it sounded like someone was listening and then hung up

....which makes me wonder how this can be done?
A phone number calls my line, and when you call back, you get a "not in service" message?

PESTS! This number has been popping up twice a day now for the last week. Whoever they are, they never leave a message.

We're having the same problem - for over a week now, although not as frequently as you got it. Hope they piss off soon.

I get this call occasionally if i call back it tells me the number is longer in service.