Global Location Number
GLNs are administered by GS1, the same organization that handles the GTIN. A GLN is assigned to a specific location, meaning that computers don't have to process the text string of a place name. It provides precision - a GLN can identify a warehouse, an office, or a shelf on a store. It can be encoded into a bar code or RFID tag, so that it can be scanned.
Extension components of the GLN allow users to identify sub-locations - storage bins, scan/read points, warehouse docks. GLNs begin with a company prefix, and end with a check digit, similar to ISBNs.