A unique nine-digit identifier issued by Dun & Bradstreet (D&B) to track a business’s credit and financial history. It’s often required for building U.S. business credit, applying for government contracts, and working with large corporations.
What is a DUNS Number?
A D-U-N-S® Number (Data Universal Numbering System) is a nine-digit business identification number assigned by Dun & Bradstreet, a major business credit reporting agency. Unlike an EIN, which is issued by the IRS for tax purposes, a DUNS number is used to create and track a company’s credit profile in the U.S. and internationally.
For non-U.S. residents who own a U.S. company, obtaining a DUNS number can be an important step in establishing credibility with suppliers, lenders, and potential partners. It allows your business to start building a credit history separate from your personal credit, which can help when applying for loans, leasing property, or negotiating favorable terms with vendors.
Many large corporations and government agencies require a valid DUNS number before they will issue purchase orders or award contracts. For example, U.S. federal government contractors must have a DUNS number to register in the System for Award Management (SAM). Some e-commerce platforms and app stores (such as Apple’s Developer Program) also require it.
To obtain a DUNS number, you register your business with Dun & Bradstreet by providing details such as your legal business name, address, phone number, and ownership information. Once assigned, your DUNS number becomes the key reference for building and tracking your company’s credit record.
In summary, the DUNS number is not a legal requirement for all businesses, but it’s a key tool for building business credit and unlocking opportunities that require verified business credentials—especially for foreign-owned companies seeking to expand their U.S. presence.
