The DUNS is a unique nine-digit identification number assigned to each company through a record in the Dun & Bradstreet company database.

DUNS stands for Data Universal Numbering System and is a concept created by the company Dun & Bradstreet (D&B) that has become the universal reference for identifying companies.

The core idea of the DUNS number is to serve as a valid identification number for businesses worldwide, while it is used by commercial and government agencies to track and manage information about those businesses. It is the most widely used authentication method for businesses in the United States and is free of charge.