These two numbers have been calling my home land line incessantly. Literally, the callerid has four or five calls from these numbers each day. Also, the callerid shows up as "Unknown Caller." Typically, I don't pick up when it says "Unknown Caller" or any of the derivatives. However, after a couple of days of this nonsense, I figured it was about time I found out who it was and what they wanted. I've answered a couple of times now, and each time the caller asks for "John." (There's no John here.) When I've inquired about a last name, I get a different last name, or something un-intelligent.
I google searched the numbers and got a hit for each number. The results are a message board with similar complaints. When I last checked the message board, there was no real answer to the problem. Were they just verifying that my number was a legitimate number? A residential number? I'm never asked anything else, no name, no address, nothing.
After my searches, and with what I (don't) know; I've just started filing a complaint with the Do Not Call list. I figure, if I add the number each time I get a call, something will get done.
If I had the time, and I thought I could pull it off as well, I'd try this.