Federal activity overview — Data Universal Numbering System
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Data Universal Numbering System Government Contracts & Federal Records
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A nine-digit number assigned by Dun & Bradstreet (D&B) to uniquely identify business entities worldwide. While DUNS numbers were historically the primary entity identifier for federal contracting, the government transitioned to the Unique Entity Identifier (UEI) in April 2022. DUNS numbers remain relevant for legacy contract references and commercial credit reporting.
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Ask about DUNSDUNS numbers were obtained through Dun & Bradstreet at no cost for government contracting purposes. Since the transition to UEI, new registrants in SAM.gov receive a UEI instead. Existing DUNS numbers remain on file for historical contract records and D&B commercial reports.
DUNS numbers appear on contracts awarded before April 2022 and remain in FPDS historical records, USAspending.gov data, and D&B commercial databases. Contractors should retain their DUNS number for reference even after the UEI transition, as past performance records and subcontracting reports may still reference them.
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Bureauify. (2026). Data Universal Numbering System — Federal Contract Intelligence. Bureauify Federal Intelligence. Retrieved , from https://bureauify.com/glossary/duns-number
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