How do you know the postal code for an address?

The postal code for an address is usually listed as the last item in an address after the city and state. If a person needs to look up the postal code for an address USPS.com allows her to search for a ZIP code by address, company and by the city.

A postal code is a series of numbers assigned to a postal address for the purpose of sorting mail. Postal codes are usually assigned to geographical areas but can also be assigned to individual addresses and institutions that receive a large volume of mail. Postal codes are also referred to as ZIP codes in the United States.