Dun & Bradstreet is a corporation that offers information on commercial credit as well as reports on businesses. Most notably, Dun & Bradstreet is recognizable for its Data Universal Numbering System (DUNS numbers); these generate business information reports for more than 100 million companies around the globe. Dun & Bradstreet was established as the result of a merger in the 1930s between R.G. Dun & Co. and the Bradstreet Cos.