This is a handy database, when you need it. Here's what their introduction page says:..."There are over 60 million individual businesses in the world, and 25 million businesses - including 2 million farms - in the United States. About 7 million companies are organized and chartered as corporations or limited liability companies (LLCs), the rest being proprietorships and partnerships. There are also around 1 million IRS-recognized non-profit organizations. A very small percentage of the corporations (and a very few large propiertorships and partnerships) are large enough to afford pubicity and advertising, and warrant the attention of national business, trade, or general publications, or otherwise enter the world of public knowledge..."
This is one of those links that if you don't save, you'll never find it again.