800notes.com falls into the category of sites I wish I'd thought of. Like most people who live in the United States, I get a fair number of telemarketing calls. There's a particularly persistent time share company that calls because I made the mistake of talking to them once. While the do-not-call list is great in theory, it doesn't account for every annoying call you get because doing business with a company means they can call you unless you specifically take action to get them to stop. I prefer to simply investigate who called by way of a simple search. Input a telephone number on 800notes.com, see who called and all the feedback people have left regarding a specific number. If it looks like I'd want to take the call, I'll pick up when they call again, otherwise I can opt to take action or simply ignore the call and hope they eventually go away. Think of 800notes.com as a review service for phone numbers you can't easily find any other way.