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.

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 ...

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.

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

Wednesday marks the 52nd birthday of the introduction of ZIP codes in the US. Though the explosion of business mail is mostly responsible for the Zoning Improvement Plan (ZIP), the idea started ...