24-09-2026 · PDF Cropper
Before your products can be stored in an Amazon fulfilment centre, each unit needs a barcode Amazon can scan. For most FBA sellers that barcode is the FNSKU. This guide explains what it is and how to label your products with the FNSKU label generator.
FNSKU stands for Fulfillment Network Stock Keeping Unit. It is a code Amazon assigns to each product you send through FBA, and it links every unit to your seller account. Most FNSKUs start with X00, for example X001ABCD23.
Open Inventory, then Manage FBA Inventory - the FNSKU is listed for each product.
Amazon's inventory and shipment reports include an fnsku column you can export to Excel.
FNSKU, product title, condition, and optionally SKU, ASIN and MRP.
Enter one product, or upload your shipment list in bulk.
An A4 sheet (21-44 labels) or a thermal label.
Print at 100% scale and put one label on each unit, covering any other barcode.
The FNSKU is how Amazon knows a unit is yours. Create clear, scannable labels with the FNSKU label generator and your stock will be received without delays.
Last Updated: 23-09-2026
