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Frequently Asked Questions for
D-U-N-S Number and SAM Registration

Do I need a D-U-N-S number to enter SAM? No, a D-U-N-S is no longer needed for registration in SAM.
How can I get a D-U-N-S Nubmer? Visit to search for your company and see if you already have a DUNS Number. If not, follow the prompts to apply.
Why were my requested changes rejected or not made? To maintain accuracy of significant business information, D&B data update policies require certain change requests to be verified by a third party prior to entry. If verification cannot be confirmed, the change request will be denied. This policy is to assist in protecting you and your company from possible identity theft.
What are D&B's Data and Privacy Policies? D&Bs privacy policy can be found at
What is a D-U-N-S number and how are they assigned? A D-U-N-S number is a unique, non-indicative 9-digit identifier issued and maintained by D&B that verifies the existence of a business entity globally. D&B assigns DUNS numbers for each physical location of a business.
Who is eligible for a D&B D-U-N-S Number? Commercial, non-profit or government entities Self-employed individuals (only individuals such as; physicians, lawyers, contractors, etc. who are engaged in a specific commercial business activity). All secondary locations including Branches and Divisions .
Are D&B D-U-N-S Numbers re-used? Once assigned, a D&B D-U-N-S Number is not reused or reissued to another business entity.
Can I have more than one D-U-N-S Number at the same physical location? Yes, more than one D-U-N-S Number can be issued at the same physical location if they are (1) separate legal entities (ie; LLC, Inc., Corp) or (2) companies that have the same legal business name but different DBA’s and/or a different line of business that is specific to the nature of operations. An example of (2) is when a HQ and branch or division are co-located, like a warehouse on the premises of the HQ.