Your billing zip code, or credit card postal code, is the five-digit number on the bottom right, which in this sample is 90210. This would be the zip code associated with your billing address. It ...

And some credit cards, like American Express, prompt retailers to ask for a ZIP code as a form of fraud protection.

The result? There are nearly the exact same number of U.S. ZIP codes represented in the batch of cards for sale on Rescator’s shop as there are unique U.S. ZIP codes of Sally Beauty stores (~2,600).

Between those two lists of ZIP codes, there are 10 ZIP codes in Rescator’s card data that do not correspond to actual Home Depot stores.