If you're looking for addresses in the real world, and not on the Internet, how would you go about it? I guess you could find information about addresses in books and magazines, but it's so much easier on the web.
And it's a lot faster too isn't it? Especially when you find addresses websites like ours, which cover the exact topic you're looking for. Being able to find exactly what you're looking for - addresses - is the real beauty of the Internet.