What Is a DUNS Number and Does Your Business Need One?
A DUNS number is a unique nine digit ID from Dun & Bradstreet that creates your business credit file. Learn what it is, who needs one, how to get one and how to keep the details correct.
If you have ever applied for a government contract, a large vendor account or certain types of financing, you may have been asked for a DUNS number. Many owners do not know what it is, whether they have one or why it matters. The short answer: your DUNS number is the key to your Dun & Bradstreet business credit file, and the details attached to it can affect how lenders see your business.
What a DUNS number is
DUNS stands for Data Universal Numbering System. A DUNS number is a unique nine digit ID that Dun & Bradstreet assigns to a business location. It works like a file number. Everything Dun & Bradstreet knows about your business, including your company details, payment history and Paydex score, is tied to it.
DUNS number vs EIN
| DUNS number | EIN | |
|---|---|---|
| Issued by | Dun & Bradstreet | IRS |
| Purpose | Business credit and business identity | Taxes and government reporting |
| Digits | Nine | Nine |
| Required? | Required for some contracts and programs | Required for most entities with employees or partners |
| Linked to | Your Dun & Bradstreet credit file | Your tax records |
Most businesses benefit from having both. Read EIN and business credit.
Who needs a DUNS number?
- Businesses that want to build business credit with Dun & Bradstreet
- Businesses applying for federal contracts or grants, which often use related identity systems
- Businesses working with large suppliers or corporate customers that check vendors
- Businesses that want a Paydex score. Read what is a Paydex score
Even if you never plan to bid on a contract, a DUNS number is a basic part of building business credit. Read how to build business credit.
Do you already have one?
Many businesses have a DUNS number without knowing it. Dun & Bradstreet sometimes creates a file when a vendor reports a payment, when public records are filed or when someone looks your business up. Before requesting a new number, search for your business with Dun & Bradstreet. Creating a second number for the same business can split your history.
How to get a DUNS number
- Gather your details: legal name, trade name, physical address, phone, owner name, entity type, start date, number of employees and main line of business.
- Make sure those details match your state filing, your website and your Google Business Profile.
- Search first to see whether a number already exists.
- Request a number through Dun & Bradstreet's free option, or choose a paid option for faster processing if you need it.
- Review the file once it is created and correct anything that is wrong.
The details attached to your DUNS number
Your DUNS number is only as useful as the details behind it. Here is what to check:
| Detail | Why it matters |
|---|---|
| Legal name | Must match your state filing |
| Trade name or DBA | Helps connect your brand to your legal entity |
| Address | Must match where you operate and your other records |
| Phone | Should be your main business line |
| Industry code | Affects how lenders see your risk, read industry code mismatches |
| Start date | Time in business matters to lenders |
| Employees and revenue | Helps describe your size |
| Status | Should show active, read business shows closed or inactive |
Common DUNS number problems
Duplicate numbers. Two numbers for one business can split your payment history across two files. Lenders may pull the weaker one.
Old addresses. A file created years ago may still show a past location. Read address mismatches.
Wrong name. The file may list a DBA, an old name or a misspelling. Read business name mismatches.
Wrong industry. An incorrect code can make your business look riskier than it is.
Inactive status. An old file may look like the business closed.
Do you need to pay Dun & Bradstreet?
You can get a DUNS number for free. Dun & Bradstreet also sells monitoring, faster processing and credit building products. Those are optional. Paying for a product does not by itself raise your score. Your score comes from your payment history and file details.
DUNS number checklist
- I searched to see whether my business already has a DUNS number
- I have one DUNS number per location, with no duplicates
- My legal name and address match my state filing
- My phone matches my website and Google Business Profile
- My industry code describes what my business actually does
- My start date is correct
- My status shows active
- I monitor my file for changes
A real world example
A home health agency applied for a contract and was asked for its DUNS number. The owner requested a new one, not knowing a file had been created years earlier under the founder's original address. Now there were two files. Vendors reported to the old one, and the contract office looked up the new, empty one. Cleaning up the duplicate and correcting the details brought the history back together on one file.
Questions owners ask about DUNS numbers
How long does it take to get one? It depends on the option you choose and whether Dun & Bradstreet needs to verify your details. Plan ahead if you need one for a deadline.
Does a DUNS number give me a Paydex score? Not by itself. A Paydex score needs enough vendor payment experiences reported to the file.
Should I update my DUNS file when I move? Yes. Update it the same week you update your state filing, website and Google Business Profile.
How Credit Desk helps with your DUNS number
A DUNS number is where your Dun & Bradstreet file begins, and it is one of the first things we check in your free business credit review. We look for duplicates, old addresses, wrong names and wrong industry codes, and we compare your bureau files against your state filing, your website and your Google Business Profile. Your private review page shows every mismatch and how we fix it.
Then we help you build the file with reporting accounts and monitor it, so the details stay right and your history stays in one place.
The bottom line
Your DUNS number is the file number for your business credit at Dun & Bradstreet. Make sure you have one, only one, and that the details are right. Get your free business credit review and we will check it for you.
Frequently asked questions
What is a DUNS number?
A DUNS number is a unique nine digit identifier that Dun & Bradstreet assigns to a business. It links to your Dun & Bradstreet business credit file.
Is a DUNS number free?
Dun & Bradstreet offers a free way to request a DUNS number. They also sell faster processing and other paid products, which are optional.
Is a DUNS number the same as an EIN?
No. An EIN comes from the IRS and is used for taxes. A DUNS number comes from Dun & Bradstreet and is used for business credit and identity. Most businesses benefit from having both.
Can my business have more than one DUNS number?
Separate locations can have their own numbers, but sometimes duplicate numbers are created for the same business by mistake. Duplicates can split your payment history and should be cleaned up.
Get a free business credit review. We compare your bureau file against your state filing, website and Google Business Profile, and show you every fix on a private review page.
This guide is general education, not legal, tax or financial advice. Bureau names and scores are trademarks of their owners. Credit Desk is not affiliated with any credit bureau. Results vary by business.