Definition of the D&B D-U-N-S Number
Created in 1962, the Data Universal Numbering System or D-U-N-S® Number is D&B's copyrighted, proprietary means of identifying business entities on a location-specific basis.
Assigned and maintained solely by D&B, this unique nine-digit identification number has been assigned to over 265 million businesses worldwide.
The D&B D-U-N-S® Number is a unique nine-digit identifier for businesses. It is used to establish a Dun & Bradstreet business credit file, which is often referenced by lenders and potential business partners to help predict the reliability and/or financial stability of the company in question. If you want to bid on government proposals, you will need to get a D-U-N-S Number for each physical location of your business.