GLn

GLN stands for Global Location Number, a globally unique identification code used within the GS1 system to identify locations and organizational entities in supply chains. It is a 13-digit number that can be encoded in GS1 barcodes and used in electronic data interchange to support efficient trading and logistics.

The GLN structure is built from a GS1 company prefix, assigned by a national GS1 member organization, followed by a location reference that identifies a specific location or entity, and ending with a check digit calculated by the modulo 10 algorithm. The last digit serves as a validation check to ensure accuracy in data capture and transmission.

GLNs identify a variety of entities, including physical locations such as warehouses, distribution centers, retail stores, and manufacturing facilities; legal entities such as parent companies or regional offices; and functional entities like departments or units within an organization. They are used in trade documents, shipping notices, invoicing, and barcode-based workflows, and can be encoded in GS1-128 barcodes for scannable data at receiving and shipping points.

In relation to other GS1 identifiers, the GLN complements product identifiers like GTINs. While GTINs identify items, GLNs identify the locations and entities involved in handling those items. Both can be used together in supply chain processes and data exchanges to create a clear, standardized identification framework.

GLNs are issued through GS1 member organizations. Organizations obtain a company prefix and generate location references to create GLNs; the system supports global interoperability and consistent identification across markets.