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 ...

ZIP codes are five-digit numbers, such as the famous 90210. Why credit card postal codes and ZIP codes matter Your postal code or ZIP code acts as a security measure.

Massachusetts Court Rules Zip Codes Can't be Required at Check Out Consumers in Massachusetts no longer have to give their zip code information when making a transaction with a credit card.