Your billing ZIP code, sometimes called your credit card ZIP code, is “associated with the address where you receive your bill. Or, if you receive e-statements, with the address you've listed on ...

There is also another type of postal code, the ZIP + 4 code. According to unitedstateszipcodes.org, the ZIP + 4 was established in 1983 and identifies an even more specific location within a ZIP code.

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.