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.

A postal code is a five digit code used to help postal services deliver mail and packages. Here's what the numbers mean and how they determine yours.

Learn the history and meaning of usps postal codes, why it's called a ZIP code, whether a postal code is a ZIP code, and what ZIP code numbers stand for.