Spokeo is a website where you can search for a person, phone number, or even an address. Spokeo aggregates personal information from phone books, social networks, real estate listings, open surveys, and many more locations. Its works best in the US. I remember many years ago when I was delivering a social engineering session at a tier 1 conference in the states, I was able to find volunteer attendees' addresses, phone numbers, and even how much they bought their house for. It's worth looking at www.spokeo.com:
