The Data Universal Numbering System, abbreviated as DUNS or D-U-N-S is a system developed and regulated by Dun & Bradstreet (D&B) which assigns a unique numeric identifier to a single business entity. This numeric identifier is then referred to as a DUNS number. It was introduced in 1963 to support D&B's credit reporting practice. It has gained wide acceptance globally and is a common standard. Its users include the European Commission, the United Nations and the United States government. It is recognized, recommended and/or required by more than 50 global, industry and trade associations. The DUNS database has over 57 million entries for business throughout the world, according to ^*.

The DUNS number is a nine-digit number issued by Dun & Bradstreet and assigned to each business location in the D&B database having a unique, separate, and distinct operation to businesses for the purpose of identifying them. The number as issued is random and the digits apparently have no significance as to their issuance. According to the D&B website, the number does contain a Mod 10 check digit to support error detection.

Unlike the Employer identification number (EIN) issued by the Internal Revenue Service, a DUNS number may be issued to any business worldwide. Certain U.S. government agencies require that a vendor have a DUNS number as well as an EIN. Other agencies such as some United Nations offices and Australian government agencies require certain businesses to have a D-U-N-S number.

The Office of Management and Budget (OMB), a United States federal agency, announced in the June 27, 2003 issue of the Federal Register (68 FR 38402) that a Dun and Bradstreet DUNS number will be required for all grant applicants for new or renewal awards on or after October 1, 2003. The DUNS number will supplement other identifiers, e.g. EIN, and will be required whether an applicant is using paper or electronic application processes.

A DUNS number is sometimes formatted with embedded dashes to promote readability, such as 15-048-3782. Modern usage typically omits dashes, and shows the number in the form 150483782 (this is the actual DUNS number of Dun and Bradstreet).

Numerous other business numbering systems exist independent of DUNS - for example the International Suppliers Network system. However, few, if any, have the volume of international businesses that are registered by DUNS.

See also

• Cage Code issued by the Defense Logistics Information Service (DLIS) to identify suppliers to the Department of Defense.
• Employer identification number issued by the IRS
• T.P.I.N. number issued by the Central Contractor Registry of the U.S. Govenrment

External links

• register a DUNS number

Universal Identifiers

D-U-N-S