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.

Discover what a billing ZIP code is and why it's important for credit card transactions. Learn when it's required and how to find your billing ZIP code.

By Teresa Dixon Murray,Cleveland Plain Dealer A growing number of retailers are requiring shoppers to provide photo identification or their billing address ZIP code if they’re using a credit or ...