Find the United States postal code of a specific area by using the USPS ZIP code lookup tool on USPS.com or the similar tool on ZIPInfo.com. Locate the Canadian postal code of an area by using the search tools on sites such as CanadaPost.com or Globefeed.com.
The USPS offers several online tools that allow you to find out the exact ZIP code of an address as well as the different ZIP codes within a city or state on its website. The ZIP Code by Address tool lets you enter in the name of a business, a street address or simply a city and state and immediately see the matching ZIP codes. In its ZIP+4 Code Lookup tool, enter in an exact street address to receive its ZIP code along with the four-digit code that belongs to the area. The tool on ZIPInfo.com asks for similar information and displays ZIP codes in a list format that includes all matching results.
The Postal Code search tool on CanadaPost.com asks you to type in the street address to receive its matching code, which consists of six digits in two groups of three compared to the five- or nine-number ZIP codes. The tool on GlobeFeed.com displays a list of major Canadian cities and provinces and allows you to browse through codes that exist within those locations.