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Validate Your GTIN (Global Trade Item Number) Fast

The GTIN is a globally unique 14-digit number used to identify trade products, or services. If this number is incorrect your products are often disapproved on Google Shopping and Amazon.

Also, other shopping channels and marketplaces can reject the advert.

First of all, Global Trade Item Numbers are unique. However, there is a standard that helps safeguard against duplicates.

There are 4 types of Global Trade Item Numbers.

In addition, the easiest way to validate your GTIN is by checking the code and establish if it reflects the one in the records. There are four types of GTINs.

They have 8, 12, 13 and 14  digits.

Still, in order to make things linear, all GTINs are expressed as 14 digits code, by adding 0 to the left.

We can find product number on the box of the item. Also, We need all digits, no matter if they are positioned slightly to the sides of the barcode symbol.

If you pick the GTIN from a database unfortunately not all databases are compliant with GS1 standards.

The 14-digit format explain how GTIN validation works.

  • GS1 Prefix is a country code where the manufacturer is registered
  • Almost half of the prefixes haven’t been assigned to countries.
  • It works for GTINs-14, -13, and -12.
  • However, validating the GS1 Prefix for GTINs-8 is different.
  • The first three numbers of a GTIN-8 written in a 14-digit format (namely, N7, N8, and N9) represent the GS1-8 Prefix, which is also allocated by GS1 to member organizations.

How do we validate the GS1 Company Prefix?

In conclusion, there are 2 available methods:

  • by using company prefix lists published by GS1 member organizations
  • or by applying GS1’s Global Electronic Party Information Registry (GEPIR)
  • GEPIR is a database managed by GS1 that contains information from about 1 million companies
  • If the Company Prefix is a valid one, the search results will include the manufacturer’s name and contact details

Now we deal with verifying the part of the GTIN that is given by the owner of the Company Prefix to a specific product. Most of all,  the number can be whatever the manufacturer wishes.

Now, we will validate all the digits of the GTIN, with the notable exception of the check digit (N 14).

  • firstly, confirm it with the brand owner.
  • secondly, most manufacturers that are GS1 licensed offer comprehensive lists of products they have given GTINs to.

Next,  we need to validate the check digit (N14). It is calculated as a function of the other numbers that compose the GTIN.

Also, we can use a check digit calculator, which you can access right here.

Alternatively, we can calculate the check digit manually. See the table below.

However, if the result we get doesn’t match N14, the GTIN is invalid. We should recheck it to make sure it is written correctly.

If you need any help with measuring and optimising your performance, or in mobile friendly website design, then please get in contact with us here at Network Intellect.


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