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What is a DUNS Number?
A DUNS (Data Universal Numbering System) Number is a unique 9-digit identifier issued by Dun & Bradstreet. It helps businesses build credit profiles, apply for government contracts, and validate their legitimacy with suppliers and partners globally. It’s widely recognized by governments and corporations worldwide as a trusted business identifier.
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Benefits of Having a DUNS Number
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Who Needs a DUNS Number?
Government Contractors
Required when bidding or applying for federal contracts and grants.
App Developers
Apple requires a DUNS Number to publish apps under a business name.
International Businesses
Needed to expand and build trust in global B2B relationships.
Corporations & LLCs
Essential for establishing credibility and accessing financing.
Business Loans & Financing
Lenders often request a DUNS to review your business creditworthiness.
Marketplace Vendors
Platforms like Walmart & SAP require DUNS to onboard verified businesses.
What is a DUNS Number?
A DUNS number is a unique nine-digit identifier issued by Dun & Bradstreet (D&B) to verify and track businesses across the globe. If you’ve ever come across terms like Dun and Bradstreet number, D&B DUNS number, or even Bradstreet DUNS number, they all refer to the same thing — a digital ID for your company that helps others confirm you're a legitimate business.
This number isn’t just a registration code — it’s essential for building your business credit profile, working with suppliers, and applying for government contracts. In fact, companies like Apple, Amazon, and even federal agencies often require you to get a DUNS number before doing business with them.
What is a Dun and Bradstreet Number?
A Dun and Bradstreet number (also written as Dun & Bradstreet number) is another way of referring to the DUNS number. Created and managed by D&B, this number connects your company to a global business directory used by lenders, partners, and governments to assess business reliability.
How a DUNS Number Works
The D-U-N-S number, short for Data Universal Numbering System, was introduced by Dun & Bradstreet in 1963 to help identify and track businesses around the world. Since then, it has become a widely recognized system for maintaining business credit information.
By 1994, the DUNS number became the official standard for federal government identification of businesses, especially for those applying for contracts or grants.
What Does a DUNS Number Do?
A DUNS number is more than just a business ID — it works like a digital profile that includes:
It also helps you look up and verify other businesses. Whether you're checking the legitimacy of a supplier, exploring new partners, or finding potential clients, your Dun and Bradstreet number plays a vital role in business networking and trust-building.
Do You Need a DUNS Number?
Getting a DUNS number is technically optional, but in the real world, it's often required. You’ll likely need one to:
If you plan to do business with the U.S. government or major corporations, having a D&B DUNS number is essential.
DUNS Number vs. EIN: What’s the Difference?
At first glance, a DUNS number and an EIN (Employer Identification Number) might seem similar — both are nine-digit identifiers for businesses. But they serve very different purposes and are issued by different authorities.
What is an EIN?
An EIN, or Employer Identification Number, is issued by the IRS (Internal Revenue Service). It’s often called a business tax ID and is mainly used for tax-related purposes. You’ll need an EIN to:
In short, an EIN is your business’s identity in the eyes of the IRS.
What is a DUNS Number?
A DUNS number, on the other hand, is issued by Dun & Bradstreet (D&B). It’s used to build and track your business credit profile, and is trusted by lenders, government agencies, and large companies to evaluate your business’s credibility.
Your DUNS number helps you:
Unlike the EIN, a DUNS number isn’t for tax purposes — it’s about reputation, verification, and growth.
DUNS Number vs. UEI: What’s the Difference?
For years, the U.S. government used the DUNS number — issued by Dun & Bradstreet — as the official way to identify businesses working with federal agencies. But in April 2022, that changed.
Today, the government uses a different system: the UEI, or Unique Entity Identifier.
What is a UEI?
The UEI is a unique number assigned to businesses through
SAM.gov (System for Award Management)
. If your company wants to do business with the U.S. government — such as applying for federal contracts or grants — you'll now need a UEI instead of a DUNS number.
Registering in SAM.gov is how businesses receive their UEI, and it's now the standard identifier across all federal agencies.
Even though the UEI has replaced the DUNS number for federal purposes, the D&B DUNS number is still widely used outside of government work. Here's when a DUNS number can still benefit your business:
In simple terms:
If you're only dealing with the U.S. government, your UEI is enough.
But if you're also active in the private sector or want to grow your business reputation, a DUNS number is still valuable.