Dun & Bradstreet
Businesswoman Working On Laptop At Desk In Office

D-U-N-S Number

About the D‑U‑N‑S Number

Find answers to your D‑U‑N‑S® Number questions here.

What Is a D‑U‑N‑S Number and Why Do I Need It?

The Dun & Bradstreet D‑U‑N‑S Number is a unique nine-digit identifier for businesses that is associated with a business’s Live Business Identity which may help evaluate potential partners, seek new contracts, apply for loans, and so much more.

Learn More

The information provided in articles are suggestions only and based on best practices. Dun & Bradstreet is not liable for the outcome or results of specific programs or tactics undertaken based on your use of the information. Please contact an attorney or financial/tax professional if you are in need of legal or financial/tax advice.

How do I get, find, and manage a D‑U‑N‑S Number?

Get a
 D‑U‑N‑S Number

How do I Get a
 D‑U‑N‑S Number?

Getting a D‑U‑N‑S Number is free, so gather your basic business information and get started here.

Learn More

Look Up a
 D‑U‑N‑S

How Do I Look Up a
 D‑U‑N‑S Number?

Look up your own D‑U‑N‑S Number or the number of a company you want to do business with.

Learn More

Update Info

How Do I Update My Company’s Business Information?

If you’re a U.S.‑based, non‑public company, you can view and request updates to your company’s business information for free through the D‑U‑N‑S Manager.

Learn More

Require a D-U-N-S

Do Companies Require a D‑U‑N‑S Number?

Many businesses will use your D-U-N-S Number to access your company’s Dun & Bradstreet credit profile to help evaluate you as a partner.

Learn More

Government Contracts

Do I Need a D‑U‑N‑S Number to Work on Government Contracts?

A D-U-N-S Number may no longer be required for government contracts, but there are still many benefits for your business.

Learn More

myD&B Mobile App Screenshot

myD&B Mobile App

Your mobile command center for D-U-N-S, business credit, and more.

Download on the Apple Store

Get it on Google Play

Are you a small business owner feeling a bit lost in the world of the D‑U‑N‑S Number? See the most common D‑U‑N‑S Number misunderstandings.

Watch Now

Please Enable Chat Cookies

Enabling and using chat functionality requires accepting Chat Cookies. You can do so by clicking 'Enable Chat Cookies' below or by managing your cookie preferences.