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.

What is a credit card ZIP code? Residents of the United States have ZIP codes instead of postal codes. ZIP codes are five-digit numbers, such as the famous 90210.

Complaints about slow mail are nothing new. But now, a new U.S. Postal Service tracker lets you see delivery statistics for yourself. The dashboard, one of the reforms included in the Postal ...

The Postal Service’s plans will delay a third of mail in 27 states, according to a Washington Post analysis, hitting states west of the Rocky Mountains especially hard.