Procurement Glossary
D-U-N-S Number (DUNS): Unique company identification in Procurement
November 19, 2025
The D-U-N-S Number (Data Universal Numbering System) is a nine-digit, unique identifier for companies worldwide that is issued by Dun & Bradstreet. In procurement, this number enables precise identification and evaluation of suppliers as well as efficient management of the supplier database. Find out below what exactly the D-U-N-S Number is, how it is used in Procurement and what advantages it offers for supplier qualification.
Key Facts
- Dun & Bradstreet's nine-digit, unique company identifier for over 400 million companies worldwide
- Enables precise supplier identification and prevents confusion with similar company names
- Free allocation for companies that register with Dun & Bradstreet
- Standardized data basis for credit checks and risk assessments in the B2B area
- International recognition as a reference for compliance and due diligence processes
Contents
Definition: D-U-N-S Number (DUNS)
The D-U-N-S Number is an internationally recognized identification system that assigns each company a unique nine-digit number.
Design and structure of the D-U-N-S Number
The D-U-N-S Number consists of nine digits without hyphens or spaces. Each number is only assigned once and remains permanently linked to the respective company. The structure follows a systematic organization:
- Clear assignment to a specific company location
- Hierarchical linking of parent company and subsidiaries
- Consideration of lines of business and branches
D-U-N-S Number vs. other identifiers
In contrast to national company registers such as the German commercial register number, the D-U-N-S Number offers global standardization. It differs from the Global Location Number in that it focuses on company identification rather than location coding.
Importance of the D-U-N-S Number in Procurement
For purchasing organizations, the D-U-N-S Number is a reliable basis for master data governance. It enables a clear assignment of supplier data and helps to avoid duplicates in the supplier database.
Methods and procedures
The integration of the D-U-N-S Number into procurement processes requires systematic procedures for data collection and management.
Implementation in supplier master data
The D-U-N-S Number is established as a mandatory field in the supplier registration. This involves automatic validation via the Dun & Bradstreet database to ensure correctness. Attribute maintenance includes regular updates of the linked company data.
Automated data synchronization
Modern ERP systems use the D-U-N-S Number for automated data synchronization with external data sources. This enables continuous updating of supplier information and supports duplicate detection through unique referencing.
Integration into compliance processes
The D-U-N-S Number serves as a reference for compliance checks and sanctions list screenings. It enables precise identification of companies in various databases and supports compliance with regulatory requirements in international trade.
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Important KPIs for DUNS
The effectiveness of D-U-N-S Number usage in Procurement can be measured and optimized using specific key figures.
Data coverage and completeness
The proportion of suppliers with a stored D-U-N-S number shows the implementation quality. A coverage rate of over 95% for strategic suppliers is the target value. The data quality KPIs also include the up-to-dateness of the linked company data.
Duplicate reduction rate
The number of identified and corrected supplier duplicates through D-U-N-S number matching measures the effectiveness of unique identification. A reduction of duplicates by at least 80% compared to name-based procedures is realistically achievable.
Degree of automation for data reconciliation
The percentage of automated supplier data updates via D-U-N-S Number referencing shows the increase in efficiency. Target values are over 70% of automated updates for master data such as addresses, contact data and management.
Risk factors and controls for D-U-N-S Number (DUNS)
Despite its advantages, the use of the D-U-N-S Number entails specific risks that must be minimized by means of suitable control mechanisms.
Data quality risks
Outdated or incorrect D-U-N-S Number assignments may result in incorrect supplier ratings. Company mergers or reorganizations may not be promptly updated in the Dun & Bradstreet database. Regular data quality checks are therefore essential.
Dependence on external data provider
The exclusive use of the D-U-N-S Number creates a dependency on Dun & Bradstreet as the sole data provider. System failures or changes in the data structure can impair procurement processes. A diversified identification strategy with alternative supplier identifiers reduces this risk.
Compliance and data protection
The disclosure of D-U-N-S Numbers to third parties may have data protection implications. Companies must ensure that the use of the number complies with the applicable data protection regulations and that sensitive business information is not unintentionally disclosed.
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Practical example
An international automotive manufacturer implements the D-U-N-S Number to standardize its global supplier database with over 15,000 suppliers. The unique identification identifies and eliminates 2,300 duplicates. The automated link with Dun & Bradstreet data enables continuous updating of creditworthiness information and compliance status. The company reduces the manual effort for supplier master data maintenance by 60% and at the same time significantly improves data quality.
- Identification and cleansing of 15% duplicates in the supplier database
- Automation of 70% of all master data updates
- Reduction of manual maintenance work by 60%
Current developments and effects
Digitalization and increasing automation in Procurement are increasing the importance of standardized company identifiers such as the D-U-N-S Number.
AI-supported supplier analysis
Artificial intelligence uses the D-U-N-S Number as a unique reference point for linking different data sources. This enables machine learning algorithms to create more precise supplier assessments and develop risk profiles. Standardized identification enables improved supply chain analytics.
Blockchain and digital identities
Blockchain-based supply chain solutions integrate the D-U-N-S Number as a trustworthy company identification. This creates transparency and traceability in complex supply networks. Smart contracts can automatically respond to D-U-N-S Number-based verifications.
Regulatory developments
International trade agreements and compliance regulations are increasingly demanding standardized company identification. The D-U-N-S Number is increasingly being used as a reference for supply market intelligence and regulatory reporting.
Conclusion
The D-U-N-S Number is establishing itself as an indispensable standard for unique company identification in modern procurement. It enables precise supplier identification, reduces duplicates and significantly supports automated data reconciliation. Despite the dependence on an external data provider, the benefits of improved data quality and process efficiency outweigh the disadvantages. Companies should implement the D-U-N-S Number as a central component of their master data governance strategy.
FAQ
What does the allocation of a D-U-N-S Number cost?
The allocation of a D-U-N-S Number is free of charge for companies. Dun & Bradstreet provides the number free of charge, as the company is refinanced through the sale of company data and creditworthiness information. Only extended data services and premium functions are subject to a charge.
How long does it take to apply for a D-U-N-S Number?
Applying for a D-U-N-S Number usually takes 1-3 working days when applying online. For more complex company structures or incomplete information, the process can take up to 30 days. Accelerated processing is possible for an additional charge.
Can companies have multiple D-U-N-S Numbers?
Yes, large companies with different locations or business areas can receive several D-U-N-S Numbers. Each legally independent unit or significant branch can apply for its own number. The numbers are linked hierarchically in order to map group structures.
How is the up-to-dateness of the D-U-N-S Number data ensured?
Dun & Bradstreet continuously updates company data from various sources such as commercial registers, press releases and direct company reports. Companies can update their data themselves via the Dun & Bradstreet portal. A regular review and update by the company itself is recommended.
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