Global Location Number

Global Location Number
Name	Global Location Number
Abbreviation	GLN
Issuing authority	GS1
Introduced	2005
Format	13-digit numeric
Purpose	location identification

Global Location Number The Global Location Number is a 13-digit identifier used to uniquely designate physical and legal locations for trade, logistics, and regulatory processes. It enables interoperability among supply chains, retailers, manufacturers, and logistics providers by linking site identifiers to data pools, registries, and electronic messages across systems used by companies like Walmart, Amazon (company), Procter & Gamble, Unilever, and Nestlé. The identifier is administered within frameworks maintained by standards organizations such as GS1 and used alongside standards from bodies like ISO and IEC.

Overview

The system provides a globally unique code that unambiguously references entities including corporate headquarters, warehouses, retail outlets, manufacturing plants, customs offices, and healthcare facilities. Large multinationals such as Coca-Cola Company, PepsiCo, Johnson & Johnson, Siemens, and Toyota Motor Corporation use these identifiers within enterprise resource planning solutions and electronic data interchange networks. Public sector actors including World Health Organization, United Nations, European Commission, United States Department of Defense, and Food and Agriculture Organization also rely on standardized location identifiers for program delivery, emergency response, and international inspection flows.

Structure and Format

The identifier follows a fixed numeric pattern derived from GS1 numbering principles. It is composed of a company prefix assigned by national GS1 organizations (e.g., GS1 US, GS1 UK, GS1 France), a location reference allocated by the company, and a check digit computed per algorithms compatible with international numeric check schemes used by ISO/IEC JTC 1. Implementations integrate with barcode symbologies and electronic standards such as GS1-128, QR Code, EDI, and XML messaging. Technology vendors such as SAP SE, Oracle Corporation, Microsoft Corporation, IBM, and Infor incorporate validation routines to enforce format and check digit calculations.

Allocation and Administration

National GS1 member organizations manage allocation policies and issue company prefixes; examples include GS1 Germany, GS1 Japan, GS1 India, and GS1 Brazil. Corporations register location references under assigned prefixes and publish details to data pools and directories. Third-party registries and cloud platforms—operated by firms like SML, 1SYNC, and major logistics integrators—facilitate discovery and synchronization of location metadata. Regulatory authorities including U.S. Food and Drug Administration, European Medicines Agency, Customs and Border Protection (United States), and World Customs Organization may require or accept these identifiers in compliance filings and trade documentation.

Uses and Applications

GLNs are applied in procurement, invoicing, inventory management, traceability, cold chain monitoring, clinical trials, and customs clearance. Pharmaceutical companies such as Pfizer, Roche, Novartis, AstraZeneca, and Merck & Co. use identifiers for serialization and track-and-trace programs alongside standards like ICH guidelines and directives from the European Commission. Retail giants integrate GLNs into point-of-sale and supplier onboarding processes, and logistics providers like DHL, FedEx, Maersk, UPS, and Kuehne + Nagel use them in shipment routing, visibility platforms, and warehouse management systems.

Implementation and Integration

Adoption typically involves assignment of prefixes, configuration of ERP, warehouse management, and transportation management systems, and publication to data exchange networks such as GS1 Global Registry, UCCnet, and industry-specific GDSNs. Integration requires mapping GLNs to other identifiers like Legal Entity Identifier codes, tax registration numbers, and customs location codes; solution integrators including Accenture, Capgemini, Deloitte, PwC, and KPMG provide migration, compliance, and change-management services. Cloud providers such as Amazon Web Services, Google Cloud, and Microsoft Azure host master data platforms that store and disseminate GLN-linked attributes.

Governance and Standards

Governance is driven by GS1 governance frameworks and international interoperability standards from ISO, IEC, and sector consortia including IHE, HL7, and GS1 Healthcare. Standardized application identifiers, syntax rules, and maintenance processes are published by GS1 and coordinated with national member organizations. Audit and conformance programs—implemented by certification bodies and industry coalitions—ensure alignment with regulatory requirements from agencies like FDA and EMA and with procurement standards used by entities such as NATO and World Bank.

Adoption and Criticism

Widespread corporate and public-sector adoption is balanced by critiques regarding cost, complexity, and governance. Small and medium-sized enterprises sometimes cite implementation expenses and integration burdens when compared to legacy local coding schemes used in markets like China, India, and Brazil. Privacy advocates and data protection authorities including European Commission bodies and national regulators have debated metadata publishing, data-sharing arrangements, and the need for consent and safeguards. Interoperability challenges persist in sectors reliant on legacy systems, prompting continued work by standards bodies and industry groups such as GS1 Healthcare, GS1 US Healthcare, and cross-industry alliances.

Category:Identifiers