Thanks to caller ID, it's often not difficult to see the what number called but the source of the call is a little murkier. WhoCallsMe? helps solve the mystery of the unknown caller.
WhoCallsMe? is a user-driven database of phone numbers. People in the same boat as you, receiving phone calls from annoying warranty scammers and their ilk, have taken the time to post the numbers and comments to the database.
The site doesn't limit itself to US only numbers, increasing its usefulness for non-US users. If you can't find a hit for an annoying repeat caller you're being harassed by, add it to the database so others can find it. Plagued by annoying calls from strange numbers? Sound off in the comments below. WhoCallsMe? [via MakeUseOf]