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 ...

Your postal code or ZIP code acts as a security measure. When making purchases online with a credit card, you may be prompted to provide the mailing address or postal code associated with your card.

Learn the importance of checking and changing your billing address with your credit card issuer and how to do it with Forbes Advisor.

What exactly is a billing ZIP code, and why do credit cards need it? Billing ZIP codes are a crucial aspect of credit card security, helping to prevent fraud and ensure authorized transactions.