Federal Entity Identity
What Is a SAM.gov Unique Entity ID (UEI)?
Understand the U.S. federal Unique Entity ID, how SAM.gov uses it for entity identification and federal awards, and DSDillon’s published UEI.
On this page
The direct answer
A Unique Entity ID is the identifier assigned through SAM.gov to an entity that needs to be identified within U.S. federal award systems. It is separate from the entity’s tax identifier and from commercial identifiers such as a D-U-N-S Number.
SAM.gov allows an entity to request a Unique Entity ID even when it does not complete full entity registration. Full registration is required for activities such as bidding directly on federal contracts or applying directly for federal financial assistance when the applicable rules require registration.
How SAM.gov uses the Unique Entity ID
The UEI gives federal systems a consistent way to identify an organization across registration and award processes. SAM.gov distinguishes obtaining a UEI from maintaining an active entity registration, so the existence of a UEI should not be presented as proof that an entity currently holds a federal contract or award.
Organizations performing procurement or grant due diligence should check the current SAM.gov entity information and registration status relevant to the transaction.
DSDillon’s Unique Entity ID
Federal entity identifier
DSDillon UEI: WANPDHBMNN42.
The identifier is published to support institutional, procurement and vendor-onboarding checks. It identifies the entity within the federal entity-identification system; it does not by itself establish award status, responsibility determination or eligibility for a particular opportunity.
The UEI replaced D-U-N-S for U.S. federal award identification
The federal government transitioned from D-U-N-S to the government-assigned UEI for federal award systems. Dun & Bradstreet continues to issue D-U-N-S Numbers for commercial business identification and credit-file purposes.
Official SAM.gov resources
Use SAM.gov for current federal entity-registration and UEI information. A public identifier on a business website is useful for matching records, while the official system should control questions about current federal registration status.
Sources and methodology
UEI descriptions were checked against official SAM.gov materials on 17 September 2026. The DSDillon UEI shown above is the company identifier supplied for publication.