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Procurement Glossary
Global Location Number (GLN): Unique Identification of Locations and Business Partners
March 30, 2026
The Global Location Number (GLN) is a globally unique 13-digit identification code for physical locations, legal entities, and functional areas in the supply chain. In procurement, it enables the precise identification of suppliers, warehouses, and production sites for efficient business processes. Below, you will learn exactly what the GLN is, how it is used, and what benefits it offers for procurement.
Key Facts
- 13-digit, globally unique identification code according to the GS1 standard
- Identifies physical locations, legal entities, and functional areas
- Enables automated data processing and EDI communication
- Reduces errors in supplier identification and address management
- Supports supply chain visibility and traceability
Content
Definition: Global Location Number (GLN)
The Global Location Number is an international standard for the unique identification of locations and business partners in global supply chains.
Structure and composition of the GLN
The GLN consists of 13 digits: a GS1 prefix (3 digits), a company number (up to 6 digits), a location number (3-6 digits), and a check digit. This structure ensures global uniqueness and enables automatic validation.
GLN vs. other identifiers
Unlike national codes such as the D‑U‑N‑S Number (DUNS) or bank-specific identifiers such as the BIC/SWIFT Code, the GLN is specifically designed for supply chain applications. It complements other Supplier Identifier with location-specific information.
Importance of the GLN in procurement
For procurement organizations, the GLN enables the precise assignment of orders, deliveries, and invoices to specific locations. This supports Master Data Governance and significantly improves data quality in procurement systems.
Methods and approaches
The successful implementation of the GLN requires structured approaches and clear processes for assignment and management.
GLN registration and assignment
Companies obtain GLNs through authorized GS1 organizations in their country. The process includes applying for a GS1 prefix, defining the locations to be identified, and systematically assigning numbers. Central Master Data Governance ensures consistent application.
Integration into procurement systems
The GLN is integrated into ERP systems, e-procurement platforms, and EDI interfaces. It is assigned to supplier master data, ordering processes, and logistics workflows. Procurement ETL Process ensure correct data transfer between different systems.
Quality assurance and validation
Regular validations check the accuracy and timeliness of GLN data. Data Quality KPIs measure the completeness and accuracy of GLN assignments in the master data.
Important KPIs for GLNs
Metrics on GLN usage help assess implementation quality and the benefits for procurement.
GLN coverage rate
This KPI measures the proportion of suppliers and locations with a valid GLN assignment. A high coverage rate of over 90% among strategic suppliers should be targeted. The Spend Classification Rate can serve as a benchmark.
Data quality of GLN master data
Completeness, accuracy, and timeliness of GLN data are measured using specific Data Quality Score. Regular Data Quality Report document improvements and identify areas requiring action.
Process efficiency through GLN usage
Reduction of order errors, delivery delays, and invoice discrepancies through unique location identification. These metrics feed into comprehensive Spend Analytics and support the evaluation of GLN benefits.
Risks, dependencies, and countermeasures
Various risks can arise when using the GLN, which must be minimized through appropriate measures.
Data quality and consistency
Incomplete or incorrect GLN assignments lead to problems in order processing and invoicing. Data Cleansing and regular validations are essential. A Data Steward should continuously monitor GLN data quality.
System integration and compatibility
Not all systems fully support GLN standards, which can lead to integration problems. Careful system selection and appropriate interface development are required. Duplicate Detection helps identify inconsistent data records.
Dependency on suppliers
Using GLNs requires supplier cooperation in providing correct location data. Contract clauses and training can ensure compliance. Supplier management programs should explicitly address GLN requirements.
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Practical example
An automotive manufacturer implements GLNs for its global supplier base of 2,500 companies with more than 8,000 production sites. Each site receives a unique GLN that is used in all ordering systems, EDI messages, and logistics processes. The implementation is carried out step by step over 18 months with pilot projects involving strategic suppliers.
- Reduction of delivery errors by 35% through unique location identification
- Automation of 85% of all EDI transactions with GLN-based processes
- Improved supply chain visibility through precise location tracking
Current developments and impacts
The digitalization of the supply chain and new technologies are changing the application and importance of the GLN in procurement.
Digital transformation and automation
Artificial intelligence and machine learning support automatic GLN assignment and validation. Automated Spend Classification uses GLN data for more precise spend analyses. These developments reduce manual effort and significantly improve data quality.
Supply chain visibility and traceability
The GLN is increasingly being used for end-to-end transparency in complex supply chains. Supply Chain Mapping and Supply Chain Analytics use GLN data for detailed traceability and risk analysis.
Sustainability and compliance
Regulatory requirements for supply chain responsibility are increasing the importance of unique location identification. The GLN supports Material Compliance and sustainability reporting through precise proof of origin.
Conclusion
The Global Location Number is an indispensable standard for modern procurement organizations that rely on precise location identification and automated processes. Its systematic implementation improves data quality, reduces errors, and enables advanced supply chain analytics. Companies should view GLNs as a strategic tool for the digital transformation of their procurement processes.
FAQ
What is the difference between GLN and other identifiers?
The GLN specifically identifies physical locations and functional areas, while other codes such as D-U-N-S Numbers cover entire companies. GLNs are specifically optimized for supply chain applications and enable granular location identification within organizations.
How is a GLN requested and managed?
GLNs are requested through national GS1 organizations. Companies receive a prefix and can then independently assign GLNs to their locations. Centralized management and documentation of all assigned GLNs is essential for data quality.
What costs are involved in using a GLN?
The costs include one-time registration fees with GS1, annual membership fees, and internal implementation costs for system adjustments. These investments pay off through improved process efficiency and reduced error costs.
How does the GLN support digital transformation?
GLNs enable fully automated EDI communication, precise supply chain analytics, and AI-based optimizations. They form the basis for digital twins of the supply chain and support IoT applications in logistics.
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