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 ...

New data reveals that your ZIP code can increase car insurance costs by 20–40%, while a poor credit score may lead to a shocking 60% increase; learn how to fight back and save money by ...

Credit card companies and others involved in the process say the ZIP code is not kept or used for marketing purposes in these self-service gas station operations.