Get a DUNS Number for your business today. Contact Client Services on   13 23 33  to find out how.

DUNS Number

Unleash the power of your data to make better decisions and maximise performance.

The DUNS Number is a unique nine-digit identification sequence which provides unique identifiers of single business entities, while linking corporate family structures together.

The D&B DUNS Numbering system is a widely recognised standard for identifying businesses among thousands of companies, marketplaces and regulatory entities. Companies worldwide use the DUNS Number to link information about suppliers, customers and trading partners, providing a more complete picture of the risk and opportunity in their business relationships.

No other organisation has the capacity to identify, verify, and inter-relate businesses to find new customers, reduce credit exposure, generate vendor savings, and prevent fraud.

Frequently Asked Questions:


Why do I need a DUNS Number?

There is no charge to obtain a D&B DUNS Number for your business and it can make it easier for your customers and suppliers to do business with you.

Some customers now request that their suppliers obtain a DUNS Number before any transactions can take place.

The DUNS Number is easy to obtain, simple to use and accepted worldwide. The code can be assigned to each of your business locations to:

  • act as a common classifier or identifier for invoices, requisitions, payments, shipping, customs clearance and other business documentation
  • ease communications with your customers
  • link your operation to parent companies, headquarters locations, branches or subsidiaries.

Applying DUNS Numbers to your internal files can help you:

  • identify risk exposure and highlight cross-selling opportunities within the same corporate family group
  • eliminate duplicate file entries and build your own value-added customer and supplier information warehouses
  • streamline your e-commerce transactions and simplify communications
  • integrate your internal systems by linking payables/receivables and tracking business documentation to the business entity and location level
  • reduce operating costs by linking interrelated suppliers and leverage this knowledge to increase purchasing power
  • uncover revenue opportunities by identifying prospects
  • improve customer service by linking related customer accounts to support a "one-customer" view.
What's the value of a DUNS Number?

By embedding the DUNS Number at the core of your global marketing, credit and purchasing transactions, you can take data you already have and turn it into powerful business information. By combining your company's internal data with D&B's database and other marketplace information you can create a value-added information source within your own organisation.

Within Enterprise Resource Planning (ERP), Enterprise Risk Management (ERM), Customer Resource Management (CRM), and Customer Information Management (CIM) solutions, the D&B DUNS Number can help ensure more accurate data rationalisation. This means that you can have confidence in the quality of information you use to manage your business.

In database marketing applications the DUNS Number allows customers to quantify how much business they are already doing within a market sector or corporate family structure to enable more effective planning of new sales and marketing activities.

In credit applications and decision-support software systems, the DUNS Number can link customer files to respective parent companies to see total credit exposure. This insight into customers' corporate family structures means that credit limits can be managed intelligently and collection efforts prioritised.

In purchasing applications the DUNS Number enables a better understanding of your supplier base by helping identify duplicate records and providing linkage information on supplier family structures. This understanding allows you to leverage your purchasing power, cut purchasing process costs and reduce the number of redundant suppliers worldwide.

The DUNS Number can help ensure that receivables are carefully managed and properly targeted by pinpointing customer locations and identifying important corporate relationships.

With the growing use of electronic commerce as a form of transaction within the global economy, the DUNS Number has assumed a fresh importance as a unique means of identifying businesses during the online transaction and registration process. By leveraging the D&B global database and the DUNS Number, companies can authenticate, validate and establish business credentials, which will facilitate smart transactions and decisions at the speed of e-business.

For companies with a serious e-commerce strategy the use of the DUNS Number as a means of identifying suppliers, trading partners and customers will be of fundamental importance as global standards are established in this area. Companies wishing to be recognised as a credible supplier of online services can use their DUNS Number as a means of identification allowing potential customers to verify their business credentials before starting a trading relationship.

D&B links the DUNS Numbers of parents, subsidiaries, headquarters and branches on more than 86 million corporate family members around the world. Used by the world's most influential standards-setting organisations, it is recognised, recommended and/or required by more than 50 global, industry and trade associations, including the United Nations, the U.S. Federal Government, the Australian Government and the European Commission.

Corporate Linkage gives you the opportunity to see the whole picture. Our unique and proprietary DUNS Number is the catalyst for data quality.

In today's global economy, the DUNS Number has become the standard for keeping track of the world's businesses.

Value of DUNS:

  • Organises Customer and Prospect Files
  • Identifies Corporate Family Tree Relationships
  • Links Related Trading Partners
  • Allows Customers to Cleanse Internal Files
  • Integrates Information Between Internal Databases
  • Enables Electronic Commerce


Understand who your customers are. Use DUNS Numbers to get a consistent and holistic view of your customers. Integrate internal databases into a standardised format. Group corporate family members together, eliminate duplicates so you can see how many customers you have and what they buy from you. Append additional third-party data so you can get a total view of all your relationships.

Prescreen for profitable prospects. Using D&B DUNS Numbers across your prospect base can help you understand the risks and opportunities. Learn about demand estimation and prescreen slow payers before it's too late. Form strong relationships with profitable prospects.

Find additional opportunity. Use D&B D-U-N-S Numbers to help understand any corporate family linkage within your prospect and customer base. Understand where existing prospects or customers may have several family members who might also need your product or service.

Monitor for trouble and opportunity. Use D&B D-U-N-S Numbers to monitor significant events of key customers. Be forewarned before customers and prospects have trouble. Constantly update your files with quality and complete information.

Find customers around the globe. Go global, close to 90 million businesses around the world have a D&B D-U-N-S Number.

Supply Chain Solutions

Know who you're buying from. Understand who all your current suppliers are. Assigning a D&B D-U-N-S Number helps identify legal ownership and accountability within your suppliers.

Understand risks and opportunities. Using the D&B D-U-N-S Number across your supplier base can help you understand the risks and opportunities within your existing supplier base. Learn about unstable suppliers before its to late, form strong relationships with viable suppliers and be proactive about finding new sources when necessary.

Reduce the number of suppliers. Understanding how many suppliers you have can help show where reductions in the total number can be made for volume discounts and service improvements.

Identify opportunities to increase leverage. Use the D&B D-U-N-S Number to help understand any corporate family linkage within your existing supplier base. Apply for volume purchase discounts when you find that you're dealing with divisions/subsidiaries of the same company.

Verify it's a real business. Use the D&B D-U-N-S Number to help verify and authenticate potential trading partners in B2B applications.

Monitor for trouble. Use the D&B D-U-N-S Number to monitor significant events of key suppliers. Be forewarned before suppliers have trouble.

Risk Management

Save research time. Understand who all your prospects and customers are. Assigning a D&B D-U-N-S Number helps identify legal ownership and accountability.

Find the best prospects. Using the D&B D-U-N-S Number across your customer base can help you understand the risks and opportunities within your existing customer base. Learn who your most profitable customers are so future marketing campaigns can focus on segments that pay the best.

Understand your exposure. Use the D&B D-U-N-S Number to help understand any corporate family linkage within your customer base. Understand where exposure is too high and where additional risk can be taken.

Verify it's a real business. Use the D&B D-U-N-S Number to help verify and authenticate potential customers in B2B applications.

Monitor for trouble. Use the D&B D-U-N-S Number to monitor significant events of key customers. Be forewarned before payments start slowing down.

How do I get a D&B DUNS Number?

At no charge to you, the D&B D-U-N-S Number can make it easier for you to trade with other businesses. Some customers even require it of their suppliers. A D&B D-U-N-S Number is a nine-digit code assigned by D&B to identify businesses with unique separate and distinct operations.

Obtain a DUNS Number for a business located in Australia

To obtain a D&B D-U-N-S Number for your business located in Australia, please complete the D&B DUNS Number Request Form.

D&B DUNS Number Application.pdf (48KB)

If you have questions about providing information to D&B, contact Client Services on 13 23 33 or email

How are DUNS Number assigned?

The D&B D-U-N-S Number is owned and solely maintained by D&B. When a business is first entered into the D&B business information database, we assign each business location that has its own unique, separate and distinct operation, its own D&B D-U-N-S Number.

Separate D&B D-U-N-S Numbers can be assigned to single locations, parents, subsidiaries, headquarters and branches. If a branch operates in the same location as its headquarters, it will have a different D&B D-U-N-S Number, provided its operations are distinct and separate. Every D&B D-U-N-S Number has a built-in check digit to help ensure accuracy.

Why should we provide information to D&B?

Your suppliers

Complete information can be the difference between winning or losing an account. Your suppliers will request credit information on potential and existing customers. In today's volatile economy more and more businesses are using third-party sources to monitor the status of their client portfolios so if you are bidding for a new contract or are reliant on other suppliers, make sure the information we hold tells the complete story of your business.

Your business can have a distinct advantage over your competitors who do not provide information to D&B. D&B's information is used increasingly for receivable management, purchasing and for pre-screening businesses prior to a marketing campaign or a special promotion. Is your information up to date so that you receive the best terms suppliers have to offer? Increased efficiencies and cost effectiveness can usually be passed on to you. Those savings can then be translated into lower expenses and give you the edge in your industry.

 Your time

In today's fast-paced world, the inclination to have customers fill out lengthy credit applications is diminishing, while the tendency to refer to third-party information, such as D&B's is increasing. In some cases, D&B is even assisting companies in managing and assessing their credit risks by performing a range of custom designed services. How are we able to do this? The past is frequently a prediction of the future and D&B has capitalised on that. We have developed powerful predictive scoring models that can assist companies in deciding the likelihood of future business failure or late payments. In the final analysis, any application process will be quicker if your D&B information is complete and up to date.

Our Reputation

D&B began in 1841 as a credit reporting agency and continues today as one of the leading providers of business-to-business credit, marketing, purchasing, receivables management and decision-support services worldwide. We maintain the world's largest database of more than 86 million businesses. We keep track of those businesses with our nine-digit identification code - the D&B D-U-N-S Number and are uniquely positioned to support B2B e-commerce.

Obtaining a D&B D-U-N-S Number is the first step toward establishing an information file about your business with D&B.

It's Free of Charge

That's right! There is no monetary cost to you to help keep your D&B information up to date. The maintenance of your D&B record is paid for by the other businesses that access it.

If you have questions about providing information to D&B contact Client Services on 13 23 33 or email

Since the D&B D-U-N-S Number was introduced in 1962, it has dramatically grown in use and is recognised as a global business identification standard for:

  • American National Standards Institute ANSI ASC X12 -- since 1989
  • United Nations/Electronic Data Interchange for Administration, Commerce and Transport/UN EDIFACT Council -- since 1991
  • European Commission (EDIRA)
  • International Standards Organisation (ISO) -- since 1993
  • United States Federal Government
  • Electronic Commerce Acquisition Team (ECAT) -- since 1994
  • Federal Energy Regulatory Commission (FERC)
  • United States Postal Service (USPS)
  • North American Free Trade Agreement (NAFTA)
  • Australian Federal Government
  • All Commonwealth & Department agencies
  • Endorsed Supplier Arrangement (ESA)

As part of the United States President's mandate to streamline the procurement process through the use of electronic commerce, the US Federal Government has adopted the D&B D-U-N-S Number as a principal contractor identification code.

This means that suppliers doing business with government agencies via Electronic Data Interchange (EDI) will be required to submit their D&B D-U-N-S Number as part of the registration and transaction processes. The D&B D-U-N-S Number is a unique identifier assigned and maintained by D&B on more than 86 million businesses worldwide. It will be used to meet government objectives for electronic commerce - including providing a single face to industry, reducing duplication of effort whilst increasing speed of service.

There is no cost to businesses for obtaining their own D&B D-U-N-S Numbers. Since the first step in every business to business transaction is proper identification of trading partners, the D&B D-U-N-S Number is an ideal tool. With its distinctive ability to identify and link businesses, the D&B D-U-N-S Number helps eliminate errors in e-commerce transactions and serves as a consistent trading partner identifier across internal business applications including Enterprise Resource Planning (ERP) systems and Customer Relationship Management (CRM) packages such as SAP, SAS, Siebel and Oracle.

Corporate Linkage

D&B uses Corporate Linkage to relate the D&B D-U-N-S Numbers of parents, subsidiaries, headquarters and branches on more than 7.7 million corporate family members around the world. Corporate Linkage allows you to uncover your total opportunity across a corporate family tree.

Our Global Coverage gives you the breadth you need.

Global Coverage

Our Global Coverage gives you access to information on over 85 million companies in Risk Management, Sales & Marketing, Supply Management and E-Commerce. We can enhance data to give you the most robust information available.

Value-Added Data

Depending on your information needs, D&B can provide your business with additional Value-Added Data including: predictive modelling and scoring, contact names, public record data, industry selectors and women and minority owned status. Our Quality Assurance gives you the peace of mind that you are making decisions with high quality data.