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.

If you don't know your nine-digit ZIP code, the U.S. Postal Service has an online lookup tool. RELATED: Outagamie County expects $3M less in sales taxes due to COVID-19 ...

Norfolk, Va. – Effective immediately, anyone sending mail to Navy mobile units must use a nine-digit ZIP code to ensure delivery, according to a message released by Secretary of the Navy Ray Mabus.