The GS1 Company Prefix is a globally unique string of numbers that is assigned by GS1 US to a particular company. The company then uses that Company Prefix (and the GS1 Standards) to generate identifiers for their products and locations that will now be unique anywhere in the world. The GS1 Company Prefix helps us to know who generated a GTIN (or U.P.C.) or a GLN. The GS1 US Data Hub | Company database also provides some basic contact information for that company, if you need to reach out to them.