How is the GSIN Formatted?

GSIN identifies the logical grouping of one or several logistic units each identified with a separate SSCC and containing trade items as being part of a specific seller / buyer relationship and that travels under one dispatch advice and/or Bill of Lading.

EDI GSIN Formation Rules

  • Application Identifier (AI): AI 402 to indicate a GSIN
  • GS1 Company Prefix: A globally unique number assigned to a GS1 member company
  • Shipper Reference: The number allocated to identify the shipment of logistical units
  • Check Digit: A mod-10 algorithm digit used to check for input errors.

The Application Identifier (402) indicates that the GS1 Application Identifier data field contains a GSIN. When encoded within a barcode, the available Symbologies are the GS1-128 and the GS1 DataMatrix. The GSIN is a 17-digit numerical number, including the Check Digit. The combined length of the GS1 Company Prefix and Shipper Reference will always total 16 digits.

  1. USE YOUR GS1 COMPANY PREFIX. Your GS1 Company Prefix is the globally unique number assigned to your company by GS1 US™ or another GS1 Member Organization. GS1 Company Prefixes are assigned to companies in varying lengths. Some GS1 US members may have a prefix license certificate that shows only a U.P.C. Company Prefix (formerly a UCC Company Prefix). A U.P.C. Company Prefix must be converted to a GS1 Company Prefix for use in the GSIN. This is accomplished by adding a zero to the front of the U.P.C. Company Prefix. The following table illustrates the conversion of a U.P.C. Company Prefix to a GS1 Company Prefix for use with GSINs.
  2. CREATE THE SHIPPER REFERENCE. This number is assigned by you, the holder of the GS1 Company Prefix, one-by-one to create a globally unique GSIN. The Shipper Reference length varies as a function of the GS1 Company Prefix length. Note: The combined length of the GS1 Company Prefix and Shipper Number is always 16 digit.
  3. CALCULATE THE CHECK DIGIT. The Check Digit is a calculated one-digit number used to ensure data integrity. To understand how this digit is calculated, refer here.

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