If you are in need of a complete database of America based businesses/organizations/companies/corporations and B2B emails+phone numbers, this one is it. This is a very comprehensive business directory database that may appeal to needs such as yellowpages. It has 22.5 Millions businesses and US business phone numbers of the United States. Other than phone numbers, it has also got types and address of the businesses. Each business is categorized under state, city and 2 business categories. There are 2 tiers of categories. The 3rd tier category is an independent table.