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.

DC will be transitioning to a new area code, 771, after reaching a capacity for 202 numbers. Many on social are wondering if this means they need to change numbers.

The Louisville region is getting a new area code to go along with Kentucky's existing five area codes.

A number with a 212 NYC area code is a badge of honor that bestows “old New York” authenticity. But why were those three numbers chosen?