When you get one of those calls - if you have Caller ID - Google the number. Results can be fascinating. We've been getting lots of credit card calls, and some others that are still unknown. Some of the numbers are frequent enough that we put them into the Call Block feature on our phone. For the rest of them - if I don't recognize the number, I just pick it up, and then hang up immediately.

What Sandie posted is correct. The Feds are trying to squash this type of call, but it takes lots of patience and time.

As for the political and charity calls - I call the political person's office and request no more calls. That works. For the charities - we don't donate to phone calls, and I tell them that, and again request no calls. For the most part, it has worked.