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.

A website spotted by Reddit seeks to show people what ZIP codes say about the demographics, culture, and lifestyle in one's area.

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 ...