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.

Your social media profile and your zip code is a treasure trove for thieves. Feb. 23, 2011— -- I knew very little about her personal life until an online search helped me discover much more ...

Esri also lets you look up monthly credit card charges per ZIP code or whether your neighborhood has a high percentage of "Financial Optimists" — people who plan to be better off than they are ...

My InsiderHere's how it works: The "ZIP Lookup" tool is powered by Esri, a geographic-information firm based in California. Just head to the website, type in your ZIP code, and you'll be greeted ...