- What is a DUNS number?
- Why you need a DUNS number
- Who needs a DUNS number?
- How to get a DUNS number
- How to look up a DUNS number
- DUNS number vs. EIN
- DUNS number vs. UEI
- Build business credit with the Ramp Business Credit Card
AI Summary
If you're trying to separate your business finances from your personal credit or work with larger organizations, a D-U-N-S number often becomes a prerequisite rather than a nice-to-have.
It's a unique nine-digit identifier issued by Dun & Bradstreet that identifies your business in commercial and government databases. It's used to establish business credit, verify your company with vendors and lenders, and meet requirements for certain contracts and applications.
What is a DUNS number?
A D-U-N-S number is a unique nine-digit identifier assigned to a business by Dun & Bradstreet (D&B). The acronym stands for data universal numbering system, and the number is used worldwide to identify businesses and track commercial activity.
Each D-U-N-S number is tied to a specific business location and remains associated with that entity over time. It functions much like a Social Security number for a company, giving lenders, vendors, and government agencies a consistent way to verify that a business exists and assess its financial reliability.
D&B introduced the D-U-N-S system in 1963, and it has since become the global standard for business identification. Today, the database includes more than 280 million business records worldwide and is recognized under the ISO/IEC 6523 standard for organizational identifiers.
How DUNS numbers work
Once a D-U-N-S number is assigned, it becomes the primary reference point for the business information Dun & Bradstreet maintains about your company. That information updates over time as D&B verifies and collects new data.
Key characteristics of the D-U-N-S system:
- The number anchors your business profile, linking details such as payment history, employee count, revenue estimates, and industry classification
- Each physical business location receives its own D-U-N-S number, even if multiple locations operate under the same legal entity
- The number is permanent and does not change if your business name, ownership structure, or address changes
Part of why the number is trusted worldwide is its standards pedigree. It works as a common business ID across countries and databases in a way newer identifiers can't match.
Dun & Bradstreet calls the profile your number connects to your Live Business Identity, the continuously updated record of who your business is and how it pays. That's the practical D-U-N-S meaning for most owners: It's the identity layer that lenders, vendors, and agencies actually check before they extend credit or terms.
Why you need a DUNS number
A D-U-N-S number is the foundation for your business's commercial identity. It allows lenders, vendors, and other organizations to evaluate your company separately from your personal credit and verify that your business is legitimate and established.
In practice, the number becomes the gateway to building business credit, qualifying for certain contracts, and working with large organizations that require standardized business verification. Without one, many applications and vendor onboarding processes simply stop.
| Benefit | How it works | Why it matters |
|---|---|---|
| Build business credit | Dun & Bradstreet uses your D-U-N-S number to track payment behavior and generate your PAYDEX score | Strong payment history helps you qualify for better terms, higher limits, and financing without personal guarantees |
| Establish vendor relationships | Large companies use D-U-N-S numbers to verify suppliers and assess financial reliability | An established profile can determine whether you receive net 30 terms or must pay up front |
| Access financing | Lenders review the business profile tied to your D-U-N-S number during credit decisions | A complete profile can speed approvals and improve borrowing terms |
| Compete for contracts and grants | While federal agencies now use a UEI, many state, local, and private entities still rely on D-U-N-S numbers | The number remains a common requirement in procurement and subcontracting workflows |
The "build business credit" benefit is worth a closer look, because it's the mechanism most owners underuse. Your payment behavior feeds your PAYDEX score, Dun & Bradstreet's 1–100 payment index tied to your D-U-N-S number. A strong PAYDEX score is what unlocks net 30 vendor terms, higher limits, and financing without a personal guarantee.
Who needs a DUNS number?
Most registered business entities should have a D-U-N-S number, even if they do not need one immediately. It establishes your business's commercial identity early and prevents delays when a lender, vendor, or partner eventually requires it. Common entity types that typically need a D-U-N-S number include:
- Limited liability companies (LLCs)
- C corporations and S corporations
- General and limited partnerships
- Nonprofit organizations, including 501(c)(3)s
- Sole proprietorships operating under a DBA
- Professional corporations and professional limited liability companies
In practice, businesses most often need a D-U-N-S number when specific operational or financial requirements arise. Those situations commonly include:
- Applying for state or local government contracts
- Registering as a supplier with large corporations
- Enrolling in company-only programs such as the Apple Developer Program
- Building business credit to separate personal and company finances
- Applying for business loans or lines of credit
How to get a DUNS number
You can apply for a D-U-N-S number directly through Dun & Bradstreet, and the process typically takes less than 10 minutes to complete. Before applying, it's worth checking whether one has already been issued to your business, as many companies are assigned a number automatically.
To get started, follow these steps:
- Check whether your business already has a D-U-N-S number by using Dun & Bradstreet's free lookup tool
- If no record exists, apply through the Dun & Bradstreet website by selecting the option to get a D-U-N-S number
- Submit your business information exactly as it appears on official records to avoid processing delays
- Wait for Dun & Bradstreet to verify your details and issue your nine-digit number
If you prefer to apply by phone, Dun & Bradstreet also accepts applications at 1-866-705-5711.
Required information for your application
Having accurate information ready helps prevent delays during verification. Dun & Bradstreet uses these details to confirm your business identity and create your profile.
You'll typically need to provide:
- Legal business name as registered with your state
- Physical business address (P.O. boxes are not accepted as a primary address)
- Mailing address, if different from your physical location
- Primary business phone number
- Name and title of a business owner or principal officer
- Number of employees
- Estimated annual revenue
- Year the business was established
- Primary industry classification, such as a SIC or NAICS code
How long does it take to get a DUNS number?
Standard processing for a D-U-N-S number can take up to 30 business days when you apply through Dun & Bradstreet's free application process. This timeline includes verification of your business details and the creation of your business profile. If you need a D-U-N-S number more quickly, Dun & Bradstreet offers an expedited option that significantly shortens the processing time.
How much does a DUNS number cost?
Getting a D-U-N-S number is free for all businesses through Dun & Bradstreet's standard application process. If you need it quickly, D&B also offers an expedited option for a $229 fee.
How to look up a DUNS number
You can look up a D-U-N-S number for your own business or for another company using publicly available tools. This is often the fastest way to confirm whether a number already exists before starting a new application.
Look up your own number
The most reliable place to search is Dun & Bradstreet's free D-U-N-S number lookup tool, which lets you search by business name, address, or phone number. Many businesses discover they already have a number assigned, even if they never applied for one directly.
Verify another company's number
Before you extend net 30 terms or onboard a new supplier, you can check and find a company's number through the same D&B lookup tool, then confirm it against the details they've given you. Running a quick verification helps you avoid doing business with a company that isn't who it claims to be.
Where to find a DUNS number
- Dun & Bradstreet's free D-U-N-S number lookup tool
- Public business profiles on SAM.gov or similar procurement systems
- Vendor onboarding documents, invoices, or contracts
- A company's website, often in the footer or About section
DUNS number vs. EIN
A D-U-N-S number and an employer identification number (EIN) are both nine-digit identifiers, but they serve different roles in how your business is identified and evaluated. Most businesses need both, depending on their tax, credit, and operational requirements.
Your EIN is issued by the IRS and is used for tax reporting, payroll, and opening certain financial accounts. A D-U-N-S number, by contrast, is issued by Dun & Bradstreet and is used to establish your business's commercial identity and credit profile.
| Feature | D-U-N-S number | EIN (employer identification number) |
|---|---|---|
| Issued by | Dun & Bradstreet | Internal Revenue Service |
| Primary purpose | Business identification and credit reporting | Federal tax filing and payroll |
| Commonly required for | Vendor onboarding, business credit, some contracts | Hiring employees, filing taxes, opening bank accounts |
| Cost | Free, with an optional $229 expedited service | Free |
| Format | Nine random digits | Nine digits with a hyphen |
DUNS number vs. UEI
If you're bidding on federal work, the D-U-N-S number is no longer the identifier that matters. In April 2022, the US federal government replaced the D-U-N-S number with the unique entity identifier (UEI) as its primary way to identify businesses, and the UEI is now assigned through SAM.gov (the System for Award Management), not Dun & Bradstreet.
Both identifiers still matter, just in different places. You need a UEI to bid on or receive federal contracts and grants, while a D-U-N-S number still matters for business credit, vendor onboarding, international business, and many state, local, and private requirements.
| Feature | D-U-N-S number | UEI |
|---|---|---|
| Issued by | Dun & Bradstreet | SAM.gov (federal government) |
| Primary purpose | Commercial credit and business identity | Federal award identification |
| Required for | Business credit, vendors, international business | Federal contracts and grants |
Build business credit with the Ramp Business Credit Card
A D-U-N-S number is a key step in building your company's credit profile, but it's only part of the picture. To really strengthen business credit, you need consistent, responsible financial activity.
With the Ramp Business Credit Card, you can build your credit history while maintaining complete control over your company's spending. Our card reports to major business credit bureaus, helping you establish the credit you need for loans, contracts, and vendor partnerships.
Unlike traditional business credit cards, Ramp has no personal credit checks, no personal guarantees, and no annual fees. You'll also get access to perks like unlimited physical and virtual cards, smart spend controls, automated expense management, and over $350,000 in partner rewards.
Get started with a free interactive demo.
FAQs
No. A D-U-N-S number is issued by Dun & Bradstreet to identify your business and track its credit, while an EIN comes from the IRS for tax filing and payroll, and most businesses need both.
Search Dun & Bradstreet's free D-U-N-S number lookup tool by business name, address, or phone number. You may also find it on SAM.gov, vendor onboarding documents, or your company's website footer.
Your LLC isn't legally required to have one, but a D-U-N-S number helps you build business credit, register as a supplier, and qualify for contracts. It's free to apply, so most LLCs benefit from getting one early.
It gives lenders, vendors, and agencies a consistent way to verify your business and assess its financial reliability. It also anchors the Dun & Bradstreet profile and PAYDEX score you use to build business credit.
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