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

What is SAM? The System for Award Management (SAM) is a Federal Government owned and operated free web site that consolidates the capabilities in Central Contractor Registration (CCR)/FedReg, Online Representations and Certifications Applications (ORCA) and the Excluded Parties List System (EPLS). Future phases of SAM will add the capabilities of other systems used in Federal procurement and awards processes. For more information visit
Do I need a DUNS number to enter SAM? Yes, the DUNS is needed to begin your registration and any updates to your company name or address need to be made at D&B prior to entering SAM.
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&B’s privacy policy can be found at
What if I don't find my company in your database? You may request a new DUNS number through the webform by clicking "Request new DUNS".
What is a DUNS number and how are they assigned? A DUNS 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 .
Is there a charge for U.S. Government contractors? Obtaining a DUNS number is absolutely free for all entities doing business with the Federal government. This includes current and perspective Contractors, Grantees, and Loan recipients. Under normal circumstances the DUNS is issued within 1-2 business days when using the D&B online process.
Are D&B D-U-N-S® Number re-used? Once assigned, a D&B D-U-N-S® Number is not reused or reissued to another business entity.
How do I know if D&B has assigned my entity a new D-U-N-S Number? A D&B Representative has confirmed that your entity has a new D-U-N-S Number. It is always best to confirm the correct D-U-N-S Number for your entity with D&B going online at or by calling 1-866-705-5711 (US Only). International registrants can confirm by contacting us: - go to - click "Federal Government Contractors or Grantee DUNS Support" - click "I have a question not covered here". Please include Company Name, D-U-N-S Number, and Physical Address, and Country.
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 brand or division (see definitions below) are co-located, like a warehouse on the premises of the HQ. Definition: Headquarters is a business that has branches or divisions reporting to it and is financially responsible for them. Branch is a secondary location of the HQ. It is not a separate corporation and has no legal responsibilities for its debt. It can be located at the same address as the HQ, if a unique tradestyle is used. Division, like a branch, is a secondary location of a business. However, a division carries out specific business operations related to the headquarters under a divisional name.
How do I Register at SAM? To register with SAM, go to, create a User ID and Password to begin, or enter your existing User ID and Password.
My Corporate Linkage information listed in SAM is incorrect. Please contact us at (click "Federal Government Contractor or Grantee DUNS Support", then click "I have a question not covered here") include your DUNS number and contact information. In the email confirm what should be listed for the HQ/Parent, Domestic Ultimate and Global Ultimate. You will then be contacted by a D&B associate.
What is DUNS+4? The +4 extension to a DUNS number is created by registrants in SAM when there is a need for more than one bank/Electronic Funds Transfer (EFT) account for a location. D&B does not create or maintain the +4 number.
How do I check my SAM Registration Status? Go to and click "Check Status" located at the top of the page. Search by entering your DUNS number or business name. If found, your registration status will be displayed.
What is TIN Matching? The TIN matching process is conducted between SAM and the IRS. Be sure to your Taxpayer Name is on the SAM IRS Consent Page as this may be different from your Legal Business Name. If your IRS Consent validation fails, please contact the IRS.
What if my DUNS Number is not recognized at A DUNS number is accepted at after you are registered at SAM. To get to the SAM site, use the link at or go directly to