Established in 1962, Dun & Bradstreet’s Data Universal Numbering System, commonly known as the
D-U-N-S® Number, is a unique global business identification system that identifies, validates, and links to more than 280 million businesses worldwide.

The D-U-N-S Number is a nine-digit non-indicative numbering sequence and is assigned at the lowest organizational level, i.e. business locations with a unique, separate, and distinct operation. The D-U-N-S Number is assigned to all types of business organizations including sole proprietorships, corporations, partnerships, non-profits, and government entities. The D-U-N-S Number is constant— it stays with a business throughout the lifecycle including name, address and corporate structure changes and even bankruptcy.

The D-U-N-S Number is not just a number—it is a system for maintaining accurate, comprehensive and timely information – and it is issued rapidly and free of charge for all entities wanting to do business with the U.S. Federal Government.