So I found this really neat new site this morning written in ASP.NET, CallerComplaints.com. The site allows you to look up complaints about a phone number and report the number The site is a vigilante site that will allow you to blow off some steam when it comes to annoying and harassing phone calls. You can read more about Caller Complaints on Mashable, which is where I found it.
The site is not only fast, but very informative too. It will tell you any side information about the number it has, such as existing complaints or information about the type of number. It also will tell you if a number was spoofed, which means the caller tricked your called id. So the next time you have an odd number on your called id, go check it out. And of course if you are abused by a telemarketer go ahead and report it!