00012345678905 is an excellent example.
Four types exist. They have varying lengths of numbers and depend on the type of product and its place of origin. They are namely:
Brands need to generate their distinctive barcodes. To do this they will merge their GS1 company prefix (if you don’t have one, you can apply for it through the GS1 website) and the item’s reference. You need to also assign a check digit, which you can easily generate using an online check digit calculator.
Alternatively, you can buy barcodes from GS1 or ask for permission from its owner to use a listed one. Otherwise, you can also appeal to be exempted from using them.
Such exemptions are only possible if you are the original manufacturer of the merchandise, the items do not have these codes, or you want to sell bundled products.
Appeal for an exemption before listing.
No. These codes are accepted across the world and do not change throughout the global supply chain. However, for SKUs, these special digits change from one brand to the other.