DUNS
Data Universal Numbering System
Codes & ClassificationsDefinition
A unique 9-digit identifier previously used for business registration in federal systems, now replaced by UEI.
More Information
DUNS numbers were issued by Dun & Bradstreet and required for SAM.gov registration until April 2022. The federal government has transitioned to the Unique Entity Identifier (UEI). Businesses that registered before the transition may still reference their DUNS number.
Example
A company's DUNS number was a 9-digit code like 123456789 used for federal contractor registration.